Finding the Fourth Proportional to 72,386.04, 99,915.86 and 45,174.90

Step by Step Solution

1. Step 1: Write the proportion equation
   72,386.04 : 99,915.86 = 45,174.90 : x
2. Step 2: Convert to fraction form
   72,386.04/99,915.86 = 45,174.90/x
3. Step 3: Cross multiply
   72,386.04x = 99,915.86 × 45,174.90
4. Step 4: Simplify right side
   72,386.04x = 4,513,688,983.91
5. Step 5: Solve for x
   x = 4,513,688,983.91/72,386.04
6. Step 6: Final answer
   x = 62,355.79