Finding the Fourth Proportional to 99,530.69, 137,352.35 and 54,818.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,530.69 : 137,352.35 = 54,818.69 : x
2. Step 2: Convert to fraction form
   99,530.69/137,352.35 = 54,818.69/x
3. Step 3: Cross multiply
   99,530.69x = 137,352.35 × 54,818.69
4. Step 4: Simplify right side
   99,530.69x = 7,529,475,895.42
5. Step 5: Solve for x
   x = 7,529,475,895.42/99,530.69
6. Step 6: Final answer
   x = 75,649.79