Finding the Fourth Proportional to 112,820.92, 155,673.10 and 64,400.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,820.92 : 155,673.10 = 64,400.72 : x
2. Step 2: Convert to fraction form
   112,820.92/155,673.10 = 64,400.72/x
3. Step 3: Cross multiply
   112,820.92x = 155,673.10 × 64,400.72
4. Step 4: Simplify right side
   112,820.92x = 10,025,459,724.63
5. Step 5: Solve for x
   x = 10,025,459,724.63/112,820.92
6. Step 6: Final answer
   x = 88,861.71