Finding the Fourth Proportional to 11,604.72, 17,430.66 and 10,248.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,604.72 : 17,430.66 = 10,248.78 : x
2. Step 2: Convert to fraction form
   11,604.72/17,430.66 = 10,248.78/x
3. Step 3: Cross multiply
   11,604.72x = 17,430.66 × 10,248.78
4. Step 4: Simplify right side
   11,604.72x = 178,642,999.59
5. Step 5: Solve for x
   x = 178,642,999.59/11,604.72
6. Step 6: Final answer
   x = 15,393.99