Finding the Fourth Proportional to 11,080.02, 16,601.52 and 7,787.21

Step by Step Solution

1. Step 1: Write the proportion equation
   11,080.02 : 16,601.52 = 7,787.21 : x
2. Step 2: Convert to fraction form
   11,080.02/16,601.52 = 7,787.21/x
3. Step 3: Cross multiply
   11,080.02x = 16,601.52 × 7,787.21
4. Step 4: Simplify right side
   11,080.02x = 129,279,522.56
5. Step 5: Solve for x
   x = 129,279,522.56/11,080.02
6. Step 6: Final answer
   x = 11,667.81