Finding the Fourth Proportional to 4,892.34, 7,334.92 and 3,139.32

Step by Step Solution

1. Step 1: Write the proportion equation
   4,892.34 : 7,334.92 = 3,139.32 : x
2. Step 2: Convert to fraction form
   4,892.34/7,334.92 = 3,139.32/x
3. Step 3: Cross multiply
   4,892.34x = 7,334.92 × 3,139.32
4. Step 4: Simplify right side
   4,892.34x = 23,026,661.05
5. Step 5: Solve for x
   x = 23,026,661.05/4,892.34
6. Step 6: Final answer
   x = 4,706.68