Finding the Fourth Proportional to 9,155.78, 12,635.01 and 4,964.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.78 : 12,635.01 = 4,964.02 : x
2. Step 2: Convert to fraction form
   9,155.78/12,635.01 = 4,964.02/x
3. Step 3: Cross multiply
   9,155.78x = 12,635.01 × 4,964.02
4. Step 4: Simplify right side
   9,155.78x = 62,720,442.34
5. Step 5: Solve for x
   x = 62,720,442.34/9,155.78
6. Step 6: Final answer
   x = 6,850.37