Finding the Fourth Proportional to 116,257.43, 160,429.78 and 64,577.88

Step by Step Solution

1. Step 1: Write the proportion equation
   116,257.43 : 160,429.78 = 64,577.88 : x
2. Step 2: Convert to fraction form
   116,257.43/160,429.78 = 64,577.88/x
3. Step 3: Cross multiply
   116,257.43x = 160,429.78 × 64,577.88
4. Step 4: Simplify right side
   116,257.43x = 10,360,215,081.27
5. Step 5: Solve for x
   x = 10,360,215,081.27/116,257.43
6. Step 6: Final answer
   x = 89,114.43