Finding the Fourth Proportional to 112,540.58, 155,288.75 and 64,784.70

Step by Step Solution

1. Step 1: Write the proportion equation
   112,540.58 : 155,288.75 = 64,784.70 : x
2. Step 2: Convert to fraction form
   112,540.58/155,288.75 = 64,784.70/x
3. Step 3: Cross multiply
   112,540.58x = 155,288.75 × 64,784.70
4. Step 4: Simplify right side
   112,540.58x = 10,060,335,082.13
5. Step 5: Solve for x
   x = 10,060,335,082.13/112,540.58
6. Step 6: Final answer
   x = 89,392.96