Finding the Fourth Proportional to 105,816.69, 146,031.24 and 58,071.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,816.69 : 146,031.24 = 58,071.76 : x
2. Step 2: Convert to fraction form
   105,816.69/146,031.24 = 58,071.76/x
3. Step 3: Cross multiply
   105,816.69x = 146,031.24 × 58,071.76
4. Step 4: Simplify right side
   105,816.69x = 8,480,291,121.78
5. Step 5: Solve for x
   x = 8,480,291,121.78/105,816.69
6. Step 6: Final answer
   x = 80,141.34