Finding the Fourth Proportional to 100,747.62, 139,029.78 and 55,422.96

Step by Step Solution

1. Step 1: Write the proportion equation
   100,747.62 : 139,029.78 = 55,422.96 : x
2. Step 2: Convert to fraction form
   100,747.62/139,029.78 = 55,422.96/x
3. Step 3: Cross multiply
   100,747.62x = 139,029.78 × 55,422.96
4. Step 4: Simplify right side
   100,747.62x = 7,705,441,935.75
5. Step 5: Solve for x
   x = 7,705,441,935.75/100,747.62
6. Step 6: Final answer
   x = 76,482.62