Finding the Fourth Proportional to 106,139.59, 146,467.34 and 58,391.71

Step by Step Solution

1. Step 1: Write the proportion equation
   106,139.59 : 146,467.34 = 58,391.71 : x
2. Step 2: Convert to fraction form
   106,139.59/146,467.34 = 58,391.71/x
3. Step 3: Cross multiply
   106,139.59x = 146,467.34 × 58,391.71
4. Step 4: Simplify right side
   106,139.59x = 8,552,478,002.59
5. Step 5: Solve for x
   x = 8,552,478,002.59/106,139.59
6. Step 6: Final answer
   x = 80,577.65