Finding the Fourth Proportional to 112,821.92, 155,674.48 and 64,401.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,821.92 : 155,674.48 = 64,401.72 : x
2. Step 2: Convert to fraction form
   112,821.92/155,674.48 = 64,401.72/x
3. Step 3: Cross multiply
   112,821.92x = 155,674.48 × 64,401.72
4. Step 4: Simplify right side
   112,821.92x = 10,025,704,272.11
5. Step 5: Solve for x
   x = 10,025,704,272.11/112,821.92
6. Step 6: Final answer
   x = 88,863.09