Finding the Fourth Proportional to 65,314.95, 90,126.57 and 39,812.10

Step by Step Solution

1. Step 1: Write the proportion equation
   65,314.95 : 90,126.57 = 39,812.10 : x
2. Step 2: Convert to fraction form
   65,314.95/90,126.57 = 39,812.10/x
3. Step 3: Cross multiply
   65,314.95x = 90,126.57 × 39,812.10
4. Step 4: Simplify right side
   65,314.95x = 3,588,128,017.50
5. Step 5: Solve for x
   x = 3,588,128,017.50/65,314.95
6. Step 6: Final answer
   x = 54,935.78