Finding the Fourth Proportional to 116,256.43, 160,428.40 and 64,576.88

Step by Step Solution

1. Step 1: Write the proportion equation
   116,256.43 : 160,428.40 = 64,576.88 : x
2. Step 2: Convert to fraction form
   116,256.43/160,428.40 = 64,576.88/x
3. Step 3: Cross multiply
   116,256.43x = 160,428.40 × 64,576.88
4. Step 4: Simplify right side
   116,256.43x = 10,359,965,535.39
5. Step 5: Solve for x
   x = 10,359,965,535.39/116,256.43
6. Step 6: Final answer
   x = 89,113.05