Finding the Fourth Proportional to 99,444.69, 148,970.19 and 86,978.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99,444.69 : 148,970.19 = 86,978.79 : x
2. Step 2: Convert to fraction form
   99,444.69/148,970.19 = 86,978.79/x
3. Step 3: Cross multiply
   99,444.69x = 148,970.19 × 86,978.79
4. Step 4: Simplify right side
   99,444.69x = 12,957,246,872.27
5. Step 5: Solve for x
   x = 12,957,246,872.27/99,444.69
6. Step 6: Final answer
   x = 130,296.02