Finding the Fourth Proportional to 93,128.16, 128,516.86 and 50,687

Step by Step Solution

1. Step 1: Write the proportion equation
   93,128.16 : 128,516.86 = 50,687 : x
2. Step 2: Convert to fraction form
   93,128.16/128,516.86 = 50,687/x
3. Step 3: Cross multiply
   93,128.16x = 128,516.86 × 50,687
4. Step 4: Simplify right side
   93,128.16x = 6,514,134,082.82
5. Step 5: Solve for x
   x = 6,514,134,082.82/93,128.16
6. Step 6: Final answer
   x = 69,948.06