Finding the Fourth Proportional to 100,087.30, 138,114.52 and 54,756.25

Step by Step Solution

1. Step 1: Write the proportion equation
   100,087.30 : 138,114.52 = 54,756.25 : x
2. Step 2: Convert to fraction form
   100,087.30/138,114.52 = 54,756.25/x
3. Step 3: Cross multiply
   100,087.30x = 138,114.52 × 54,756.25
4. Step 4: Simplify right side
   100,087.30x = 7,562,633,480.47
5. Step 5: Solve for x
   x = 7,562,633,480.47/100,087.30
6. Step 6: Final answer
   x = 75,560.37