Finding the Fourth Proportional to 99,964.06, 137,928.18 and 57,522.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99,964.06 : 137,928.18 = 57,522.59 : x
2. Step 2: Convert to fraction form
   99,964.06/137,928.18 = 57,522.59/x
3. Step 3: Cross multiply
   99,964.06x = 137,928.18 × 57,522.59
4. Step 4: Simplify right side
   99,964.06x = 7,933,986,147.59
5. Step 5: Solve for x
   x = 7,933,986,147.59/99,964.06
6. Step 6: Final answer
   x = 79,368.39