Finding the Fourth Proportional to 100,114.72, 138,158.32 and 54,792.80

Step by Step Solution

1. Step 1: Write the proportion equation
   100,114.72 : 138,158.32 = 54,792.80 : x
2. Step 2: Convert to fraction form
   100,114.72/138,158.32 = 54,792.80/x
3. Step 3: Cross multiply
   100,114.72x = 138,158.32 × 54,792.80
4. Step 4: Simplify right side
   100,114.72x = 7,570,081,196.10
5. Step 5: Solve for x
   x = 7,570,081,196.10/100,114.72
6. Step 6: Final answer
   x = 75,614.07