Finding the Fourth Proportional to 65,988.61, 91,040.42 and 43,339.87

Step by Step Solution

1. Step 1: Write the proportion equation
   65,988.61 : 91,040.42 = 43,339.87 : x
2. Step 2: Convert to fraction form
   65,988.61/91,040.42 = 43,339.87/x
3. Step 3: Cross multiply
   65,988.61x = 91,040.42 × 43,339.87
4. Step 4: Simplify right side
   65,988.61x = 3,945,679,967.55
5. Step 5: Solve for x
   x = 3,945,679,967.55/65,988.61
6. Step 6: Final answer
   x = 59,793.35