Finding the Fourth Proportional to 2,391,300,978.20, 3,586,709,283.32 and 644,680,273.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391,300,978.20 : 3,586,709,283.32 = 644,680,273.62 : x
2. Step 2: Convert to fraction form
   2,391,300,978.20/3,586,709,283.32 = 644,680,273.62/x
3. Step 3: Cross multiply
   2,391,300,978.20x = 3,586,709,283.32 × 644,680,273.62
4. Step 4: Simplify right side
   2,391,300,978.20x = 2,312,280,722,181,193,728
5. Step 5: Solve for x
   x = 2,312,280,722,181,193,728/2,391,300,978.20
6. Step 6: Final answer
   x = 966,955,119.10