Finding the Fourth Proportional to 112,402.88, 155,120.42 and 64,656.17

Step by Step Solution

1. Step 1: Write the proportion equation
   112,402.88 : 155,120.42 = 64,656.17 : x
2. Step 2: Convert to fraction form
   112,402.88/155,120.42 = 64,656.17/x
3. Step 3: Cross multiply
   112,402.88x = 155,120.42 × 64,656.17
4. Step 4: Simplify right side
   112,402.88x = 10,029,491,632.03
5. Step 5: Solve for x
   x = 10,029,491,632.03/112,402.88
6. Step 6: Final answer
   x = 89,228.07