Finding the Fourth Proportional to 106,139.79, 146,467.59 and 58,391.91

Step by Step Solution

1. Step 1: Write the proportion equation
   106,139.79 : 146,467.59 = 58,391.91 : x
2. Step 2: Convert to fraction form
   106,139.79/146,467.59 = 58,391.91/x
3. Step 3: Cross multiply
   106,139.79x = 146,467.59 × 58,391.91
4. Step 4: Simplify right side
   106,139.79x = 8,552,522,333.20
5. Step 5: Solve for x
   x = 8,552,522,333.20/106,139.79
6. Step 6: Final answer
   x = 80,577.91