Finding the Fourth Proportional to 12,567.52, 17,342.16 and 6,978.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,567.52 : 17,342.16 = 6,978.40 : x
2. Step 2: Convert to fraction form
   12,567.52/17,342.16 = 6,978.40/x
3. Step 3: Cross multiply
   12,567.52x = 17,342.16 × 6,978.40
4. Step 4: Simplify right side
   12,567.52x = 121,020,529.34
5. Step 5: Solve for x
   x = 121,020,529.34/12,567.52
6. Step 6: Final answer
   x = 9,629.63