Finding the Fourth Proportional to 99,847.30, 137,777.94 and 57,419.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,847.30 : 137,777.94 = 57,419.50 : x
2. Step 2: Convert to fraction form
   99,847.30/137,777.94 = 57,419.50/x
3. Step 3: Cross multiply
   99,847.30x = 137,777.94 × 57,419.50
4. Step 4: Simplify right side
   99,847.30x = 7,911,140,425.83
5. Step 5: Solve for x
   x = 7,911,140,425.83/99,847.30
6. Step 6: Final answer
   x = 79,232.39