Finding the Fourth Proportional to 11,997.31, 16,552.97 and 7,748.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,997.31 : 16,552.97 = 7,748.55 : x
2. Step 2: Convert to fraction form
   11,997.31/16,552.97 = 7,748.55/x
3. Step 3: Cross multiply
   11,997.31x = 16,552.97 × 7,748.55
4. Step 4: Simplify right side
   11,997.31x = 128,261,515.69
5. Step 5: Solve for x
   x = 128,261,515.69/11,997.31
6. Step 6: Final answer
   x = 10,690.86