Finding the Fourth Proportional to 66,291.59, 91,513.68 and 42,432.10

Step by Step Solution

1. Step 1: Write the proportion equation
   66,291.59 : 91,513.68 = 42,432.10 : x
2. Step 2: Convert to fraction form
   66,291.59/91,513.68 = 42,432.10/x
3. Step 3: Cross multiply
   66,291.59x = 91,513.68 × 42,432.10
4. Step 4: Simplify right side
   66,291.59x = 3,883,117,392.34
5. Step 5: Solve for x
   x = 3,883,117,392.34/66,291.59
6. Step 6: Final answer
   x = 58,576.32