Finding the Fourth Proportional to 100,358.24, 138,494.57 and 55,036.55

Step by Step Solution

1. Step 1: Write the proportion equation
   100,358.24 : 138,494.57 = 55,036.55 : x
2. Step 2: Convert to fraction form
   100,358.24/138,494.57 = 55,036.55/x
3. Step 3: Cross multiply
   100,358.24x = 138,494.57 × 55,036.55
4. Step 4: Simplify right side
   100,358.24x = 7,622,262,496.47
5. Step 5: Solve for x
   x = 7,622,262,496.47/100,358.24
6. Step 6: Final answer
   x = 75,950.54