Finding the Fourth Proportional to 65,937.59, 90,978.12 and 39,075.47

Step by Step Solution

1. Step 1: Write the proportion equation
   65,937.59 : 90,978.12 = 39,075.47 : x
2. Step 2: Convert to fraction form
   65,937.59/90,978.12 = 39,075.47/x
3. Step 3: Cross multiply
   65,937.59x = 90,978.12 × 39,075.47
4. Step 4: Simplify right side
   65,937.59x = 3,555,012,798.72
5. Step 5: Solve for x
   x = 3,555,012,798.72/65,937.59
6. Step 6: Final answer
   x = 53,914.81