Finding the Fourth Proportional to 99,846.30, 137,776.56 and 57,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,846.30 : 137,776.56 = 57,418.50 : x
2. Step 2: Convert to fraction form
   99,846.30/137,776.56 = 57,418.50/x
3. Step 3: Cross multiply
   99,846.30x = 137,776.56 × 57,418.50
4. Step 4: Simplify right side
   99,846.30x = 7,910,923,410.36
5. Step 5: Solve for x
   x = 7,910,923,410.36/99,846.30
6. Step 6: Final answer
   x = 79,231.01