Finding the Fourth Proportional to 99,828.69, 137,762.55 and 54,506.53

Step by Step Solution

1. Step 1: Write the proportion equation
   99,828.69 : 137,762.55 = 54,506.53 : x
2. Step 2: Convert to fraction form
   99,828.69/137,762.55 = 54,506.53/x
3. Step 3: Cross multiply
   99,828.69x = 137,762.55 × 54,506.53
4. Step 4: Simplify right side
   99,828.69x = 7,508,959,200.76
5. Step 5: Solve for x
   x = 7,508,959,200.76/99,828.69
6. Step 6: Final answer
   x = 75,218.45