Finding the Fourth Proportional to 99,786.25, 149,599.88 and 57,618.46

Step by Step Solution

1. Step 1: Write the proportion equation
   99,786.25 : 149,599.88 = 57,618.46 : x
2. Step 2: Convert to fraction form
   99,786.25/149,599.88 = 57,618.46/x
3. Step 3: Cross multiply
   99,786.25x = 149,599.88 × 57,618.46
4. Step 4: Simplify right side
   99,786.25x = 8,619,713,665.69
5. Step 5: Solve for x
   x = 8,619,713,665.69/99,786.25
6. Step 6: Final answer
   x = 86,381.78