Finding the Fourth Proportional to 1,137,111.12, 1,569,216.69 and 620,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137,111.12 : 1,569,216.69 = 620,869.50 : x
2. Step 2: Convert to fraction form
   1,137,111.12/1,569,216.69 = 620,869.50/x
3. Step 3: Cross multiply
   1,137,111.12x = 1,569,216.69 × 620,869.50
4. Step 4: Simplify right side
   1,137,111.12x = 974,278,781,711.96
5. Step 5: Solve for x
   x = 974,278,781,711.96/1,137,111.12
6. Step 6: Final answer
   x = 856,801.74