Finding the Fourth Proportional to 60,800.21, 83,838.16 and 39,540.05

Step by Step Solution

1. Step 1: Write the proportion equation
   60,800.21 : 83,838.16 = 39,540.05 : x
2. Step 2: Convert to fraction form
   60,800.21/83,838.16 = 39,540.05/x
3. Step 3: Cross multiply
   60,800.21x = 83,838.16 × 39,540.05
4. Step 4: Simplify right side
   60,800.21x = 3,314,965,038.31
5. Step 5: Solve for x
   x = 3,314,965,038.31/60,800.21
6. Step 6: Final answer
   x = 54,522.26