Finding the Fourth Proportional to 99,146.50, 136,824.33 and 54,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,146.50 : 136,824.33 = 54,434.50 : x
2. Step 2: Convert to fraction form
   99,146.50/136,824.33 = 54,434.50/x
3. Step 3: Cross multiply
   99,146.50x = 136,824.33 × 54,434.50
4. Step 4: Simplify right side
   99,146.50x = 7,447,963,991.39
5. Step 5: Solve for x
   x = 7,447,963,991.39/99,146.50
6. Step 6: Final answer
   x = 75,120.80