Finding the Fourth Proportional to 99,395.42, 137,162.56 and 54,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   99,395.42 : 137,162.56 = 54,072.24 : x
2. Step 2: Convert to fraction form
   99,395.42/137,162.56 = 54,072.24/x
3. Step 3: Cross multiply
   99,395.42x = 137,162.56 × 54,072.24
4. Step 4: Simplify right side
   99,395.42x = 7,416,686,863.33
5. Step 5: Solve for x
   x = 7,416,686,863.33/99,395.42
6. Step 6: Final answer
   x = 74,617.99