Finding the Fourth Proportional to 66,300.36, 91,505.86 and 42,425.88

Step by Step Solution

1. Step 1: Write the proportion equation
   66,300.36 : 91,505.86 = 42,425.88 : x
2. Step 2: Convert to fraction form
   66,300.36/91,505.86 = 42,425.88/x
3. Step 3: Cross multiply
   66,300.36x = 91,505.86 × 42,425.88
4. Step 4: Simplify right side
   66,300.36x = 3,882,216,635.66
5. Step 5: Solve for x
   x = 3,882,216,635.66/66,300.36
6. Step 6: Final answer
   x = 58,554.99