Finding the Fourth Proportional to 11,700.42, 17,544.30 and 5,118.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,700.42 : 17,544.30 = 5,118.90 : x
2. Step 2: Convert to fraction form
   11,700.42/17,544.30 = 5,118.90/x
3. Step 3: Cross multiply
   11,700.42x = 17,544.30 × 5,118.90
4. Step 4: Simplify right side
   11,700.42x = 89,807,432.28
5. Step 5: Solve for x
   x = 89,807,432.28/11,700.42
6. Step 6: Final answer
   x = 7,675.58