Finding the Fourth Proportional to 1,189,833.82, 1,641,970.65 and 645,969.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,189,833.82 : 1,641,970.65 = 645,969.58 : x
2. Step 2: Convert to fraction form
   1,189,833.82/1,641,970.65 = 645,969.58/x
3. Step 3: Cross multiply
   1,189,833.82x = 1,641,970.65 × 645,969.58
4. Step 4: Simplify right side
   1,189,833.82x = 1,060,663,091,152.83
5. Step 5: Solve for x
   x = 1,060,663,091,152.83/1,189,833.82
6. Step 6: Final answer
   x = 891,438.01