Finding the Fourth Proportional to 8,978.17, 13,470.50 and 3,135.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.17 : 13,470.50 = 3,135.64 : x
2. Step 2: Convert to fraction form
   8,978.17/13,470.50 = 3,135.64/x
3. Step 3: Cross multiply
   8,978.17x = 13,470.50 × 3,135.64
4. Step 4: Simplify right side
   8,978.17x = 42,238,622.94
5. Step 5: Solve for x
   x = 42,238,622.94/8,978.17
6. Step 6: Final answer
   x = 4,704.59