Finding the Fourth Proportional to 11,454.32, 17,180.52 and 7,780.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,454.32 : 17,180.52 = 7,780.16 : x
2. Step 2: Convert to fraction form
   11,454.32/17,180.52 = 7,780.16/x
3. Step 3: Cross multiply
   11,454.32x = 17,180.52 × 7,780.16
4. Step 4: Simplify right side
   11,454.32x = 133,667,194.48
5. Step 5: Solve for x
   x = 133,667,194.48/11,454.32
6. Step 6: Final answer
   x = 11,669.59