Finding the Fourth Proportional to 99,864.81, 137,814.48 and 54,544.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,864.81 : 137,814.48 = 54,544.10 : x
2. Step 2: Convert to fraction form
   99,864.81/137,814.48 = 54,544.10/x
3. Step 3: Cross multiply
   99,864.81x = 137,814.48 × 54,544.10
4. Step 4: Simplify right side
   99,864.81x = 7,516,966,089.50
5. Step 5: Solve for x
   x = 7,516,966,089.50/99,864.81
6. Step 6: Final answer
   x = 75,271.42