Finding the Fourth Proportional to 12,750.86, 17,590.74 and 7,967.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,750.86 : 17,590.74 = 7,967.55 : x
2. Step 2: Convert to fraction form
   12,750.86/17,590.74 = 7,967.55/x
3. Step 3: Cross multiply
   12,750.86x = 17,590.74 × 7,967.55
4. Step 4: Simplify right side
   12,750.86x = 140,155,004.64
5. Step 5: Solve for x
   x = 140,155,004.64/12,750.86
6. Step 6: Final answer
   x = 10,991.81