Finding the Fourth Proportional to 99,162.43, 136,830.38 and 58,328.39

Step by Step Solution

1. Step 1: Write the proportion equation
   99,162.43 : 136,830.38 = 58,328.39 : x
2. Step 2: Convert to fraction form
   99,162.43/136,830.38 = 58,328.39/x
3. Step 3: Cross multiply
   99,162.43x = 136,830.38 × 58,328.39
4. Step 4: Simplify right side
   99,162.43x = 7,981,095,818.92
5. Step 5: Solve for x
   x = 7,981,095,818.92/99,162.43
6. Step 6: Final answer
   x = 80,485.08