Finding the Fourth Proportional to 112,520.57, 155,294.69 and 64,773.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,520.57 : 155,294.69 = 64,773.50 : x
2. Step 2: Convert to fraction form
   112,520.57/155,294.69 = 64,773.50/x
3. Step 3: Cross multiply
   112,520.57x = 155,294.69 × 64,773.50
4. Step 4: Simplify right side
   112,520.57x = 10,058,979,502.37
5. Step 5: Solve for x
   x = 10,058,979,502.37/112,520.57
6. Step 6: Final answer
   x = 89,396.81