Finding the Fourth Proportional to 99,886.50, 137,843.37 and 57,444.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,886.50 : 137,843.37 = 57,444.12 : x
2. Step 2: Convert to fraction form
   99,886.50/137,843.37 = 57,444.12/x
3. Step 3: Cross multiply
   99,886.50x = 137,843.37 × 57,444.12
4. Step 4: Simplify right side
   99,886.50x = 7,918,291,087.48
5. Step 5: Solve for x
   x = 7,918,291,087.48/99,886.50
6. Step 6: Final answer
   x = 79,272.89