Finding the Fourth Proportional to 99,422.68, 137,201.06 and 54,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,422.68 : 137,201.06 = 54,100.78 : x
2. Step 2: Convert to fraction form
   99,422.68/137,201.06 = 54,100.78/x
3. Step 3: Cross multiply
   99,422.68x = 137,201.06 × 54,100.78
4. Step 4: Simplify right side
   99,422.68x = 7,422,684,362.83
5. Step 5: Solve for x
   x = 7,422,684,362.83/99,422.68
6. Step 6: Final answer
   x = 74,657.86