Finding the Fourth Proportional to 66,498.28, 91,754.19 and 42,308.85

Step by Step Solution

1. Step 1: Write the proportion equation
   66,498.28 : 91,754.19 = 42,308.85 : x
2. Step 2: Convert to fraction form
   66,498.28/91,754.19 = 42,308.85/x
3. Step 3: Cross multiply
   66,498.28x = 91,754.19 × 42,308.85
4. Step 4: Simplify right side
   66,498.28x = 3,882,014,208.54
5. Step 5: Solve for x
   x = 3,882,014,208.54/66,498.28
6. Step 6: Final answer
   x = 58,377.66