Finding the Fourth Proportional to 99,131.40, 148,697.37 and 69,680.97

Step by Step Solution

1. Step 1: Write the proportion equation
   99,131.40 : 148,697.37 = 69,680.97 : x
2. Step 2: Convert to fraction form
   99,131.40/148,697.37 = 69,680.97/x
3. Step 3: Cross multiply
   99,131.40x = 148,697.37 × 69,680.97
4. Step 4: Simplify right side
   99,131.40x = 10,361,376,978.05
5. Step 5: Solve for x
   x = 10,361,376,978.05/99,131.40
6. Step 6: Final answer
   x = 104,521.64