Finding the Fourth Proportional to 7,156.78, 9,877.61 and 4,505.04

Step by Step Solution

1. Step 1: Write the proportion equation
   7,156.78 : 9,877.61 = 4,505.04 : x
2. Step 2: Convert to fraction form
   7,156.78/9,877.61 = 4,505.04/x
3. Step 3: Cross multiply
   7,156.78x = 9,877.61 × 4,505.04
4. Step 4: Simplify right side
   7,156.78x = 44,499,028.15
5. Step 5: Solve for x
   x = 44,499,028.15/7,156.78
6. Step 6: Final answer
   x = 6,217.74