Finding the Fourth Proportional to 112,439.76, 155,167.02 and 64,692.15

Step by Step Solution

1. Step 1: Write the proportion equation
   112,439.76 : 155,167.02 = 64,692.15 : x
2. Step 2: Convert to fraction form
   112,439.76/155,167.02 = 64,692.15/x
3. Step 3: Cross multiply
   112,439.76x = 155,167.02 × 64,692.15
4. Step 4: Simplify right side
   112,439.76x = 10,038,088,132.89
5. Step 5: Solve for x
   x = 10,038,088,132.89/112,439.76
6. Step 6: Final answer
   x = 89,275.25