Finding the Fourth Proportional to 62,516.72, 86,313.32 and 55,790.79

Step by Step Solution

1. Step 1: Write the proportion equation
   62,516.72 : 86,313.32 = 55,790.79 : x
2. Step 2: Convert to fraction form
   62,516.72/86,313.32 = 55,790.79/x
3. Step 3: Cross multiply
   62,516.72x = 86,313.32 × 55,790.79
4. Step 4: Simplify right side
   62,516.72x = 4,815,488,031.37
5. Step 5: Solve for x
   x = 4,815,488,031.37/62,516.72
6. Step 6: Final answer
   x = 77,027.21