Finding the Fourth Proportional to 156,626.10, 234,939.15 and 72,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   156,626.10 : 234,939.15 = 72,386.10 : x
2. Step 2: Convert to fraction form
   156,626.10/234,939.15 = 72,386.10/x
3. Step 3: Cross multiply
   156,626.10x = 234,939.15 × 72,386.10
4. Step 4: Simplify right side
   156,626.10x = 17,006,328,805.82
5. Step 5: Solve for x
   x = 17,006,328,805.82/156,626.10
6. Step 6: Final answer
   x = 108,579.15