Finding the Fourth Proportional to 99,798.32, 137,722.20 and 55,086.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,798.32 : 137,722.20 = 55,086.32 : x
2. Step 2: Convert to fraction form
   99,798.32/137,722.20 = 55,086.32/x
3. Step 3: Cross multiply
   99,798.32x = 137,722.20 × 55,086.32
4. Step 4: Simplify right side
   99,798.32x = 7,586,609,180.30
5. Step 5: Solve for x
   x = 7,586,609,180.30/99,798.32
6. Step 6: Final answer
   x = 76,019.41