Finding the Fourth Proportional to 82,129.56, 122,886.72 and 58,491.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,129.56 : 122,886.72 = 58,491.72 : x
2. Step 2: Convert to fraction form
   82,129.56/122,886.72 = 58,491.72/x
3. Step 3: Cross multiply
   82,129.56x = 122,886.72 × 58,491.72
4. Step 4: Simplify right side
   82,129.56x = 7,187,855,617.96
5. Step 5: Solve for x
   x = 7,187,855,617.96/82,129.56
6. Step 6: Final answer
   x = 87,518.50