Finding the Fourth Proportional to 1,320,155.31, 1,980,659.43 and 610,648.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320,155.31 : 1,980,659.43 = 610,648.77 : x
2. Step 2: Convert to fraction form
   1,320,155.31/1,980,659.43 = 610,648.77/x
3. Step 3: Cross multiply
   1,320,155.31x = 1,980,659.43 × 610,648.77
4. Step 4: Simplify right side
   1,320,155.31x = 1,209,487,244,718.40
5. Step 5: Solve for x
   x = 1,209,487,244,718.40/1,320,155.31
6. Step 6: Final answer
   x = 916,170.42