Finding the Fourth Proportional to 100,073.56, 138,100.98 and 54,750.72

Step by Step Solution

1. Step 1: Write the proportion equation
   100,073.56 : 138,100.98 = 54,750.72 : x
2. Step 2: Convert to fraction form
   100,073.56/138,100.98 = 54,750.72/x
3. Step 3: Cross multiply
   100,073.56x = 138,100.98 × 54,750.72
4. Step 4: Simplify right side
   100,073.56x = 7,561,128,087.71
5. Step 5: Solve for x
   x = 7,561,128,087.71/100,073.56
6. Step 6: Final answer
   x = 75,555.70