Finding the Fourth Proportional to 65,784.99, 90,798.27 and 38,943.21

Step by Step Solution

1. Step 1: Write the proportion equation
   65,784.99 : 90,798.27 = 38,943.21 : x
2. Step 2: Convert to fraction form
   65,784.99/90,798.27 = 38,943.21/x
3. Step 3: Cross multiply
   65,784.99x = 90,798.27 × 38,943.21
4. Step 4: Simplify right side
   65,784.99x = 3,535,976,096.25
5. Step 5: Solve for x
   x = 3,535,976,096.25/65,784.99
6. Step 6: Final answer
   x = 53,750.50