Finding the Fourth Proportional to 103,018.32, 142,155.72 and 58,306.32

Step by Step Solution

1. Step 1: Write the proportion equation
   103,018.32 : 142,155.72 = 58,306.32 : x
2. Step 2: Convert to fraction form
   103,018.32/142,155.72 = 58,306.32/x
3. Step 3: Cross multiply
   103,018.32x = 142,155.72 × 58,306.32
4. Step 4: Simplify right side
   103,018.32x = 8,288,576,900.15
5. Step 5: Solve for x
   x = 8,288,576,900.15/103,018.32
6. Step 6: Final answer
   x = 80,457.31