Finding the Fourth Proportional to 65,941.99, 90,994.56 and 38,715.21

Step by Step Solution

1. Step 1: Write the proportion equation
   65,941.99 : 90,994.56 = 38,715.21 : x
2. Step 2: Convert to fraction form
   65,941.99/90,994.56 = 38,715.21/x
3. Step 3: Cross multiply
   65,941.99x = 90,994.56 × 38,715.21
4. Step 4: Simplify right side
   65,941.99x = 3,522,872,850.71
5. Step 5: Solve for x
   x = 3,522,872,850.71/65,941.99
6. Step 6: Final answer
   x = 53,423.82