Finding the Fourth Proportional to 1,145,993.72, 1,581,520.54 and 636,696.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145,993.72 : 1,581,520.54 = 636,696.10 : x
2. Step 2: Convert to fraction form
   1,145,993.72/1,581,520.54 = 636,696.10/x
3. Step 3: Cross multiply
   1,145,993.72x = 1,581,520.54 × 636,696.10
4. Step 4: Simplify right side
   1,145,993.72x = 1,006,947,951,980.29
5. Step 5: Solve for x
   x = 1,006,947,951,980.29/1,145,993.72
6. Step 6: Final answer
   x = 878,667.95