Finding the Fourth Proportional to 66,308.63, 91,517.78 and 42,434.49

Step by Step Solution

1. Step 1: Write the proportion equation
   66,308.63 : 91,517.78 = 42,434.49 : x
2. Step 2: Convert to fraction form
   66,308.63/91,517.78 = 42,434.49/x
3. Step 3: Cross multiply
   66,308.63x = 91,517.78 × 42,434.49
4. Step 4: Simplify right side
   66,308.63x = 3,883,510,108.06
5. Step 5: Solve for x
   x = 3,883,510,108.06/66,308.63
6. Step 6: Final answer
   x = 58,567.19