Finding the Fourth Proportional to 99,773.36, 137,686.56 and 55,061.36

Step by Step Solution

1. Step 1: Write the proportion equation
   99,773.36 : 137,686.56 = 55,061.36 : x
2. Step 2: Convert to fraction form
   99,773.36/137,686.56 = 55,061.36/x
3. Step 3: Cross multiply
   99,773.36x = 137,686.56 × 55,061.36
4. Step 4: Simplify right side
   99,773.36x = 7,581,209,247.32
5. Step 5: Solve for x
   x = 7,581,209,247.32/99,773.36
6. Step 6: Final answer
   x = 75,984.30