Finding the Fourth Proportional to 100,754.74, 139,036.17 and 55,425.43

Step by Step Solution

1. Step 1: Write the proportion equation
   100,754.74 : 139,036.17 = 55,425.43 : x
2. Step 2: Convert to fraction form
   100,754.74/139,036.17 = 55,425.43/x
3. Step 3: Cross multiply
   100,754.74x = 139,036.17 × 55,425.43
4. Step 4: Simplify right side
   100,754.74x = 7,706,139,507.80
5. Step 5: Solve for x
   x = 7,706,139,507.80/100,754.74
6. Step 6: Final answer
   x = 76,484.14