Finding the Fourth Proportional to 11,484.61, 17,199.57 and 7,978.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,484.61 : 17,199.57 = 7,978.12 : x
2. Step 2: Convert to fraction form
   11,484.61/17,199.57 = 7,978.12/x
3. Step 3: Cross multiply
   11,484.61x = 17,199.57 × 7,978.12
4. Step 4: Simplify right side
   11,484.61x = 137,220,233.41
5. Step 5: Solve for x
   x = 137,220,233.41/11,484.61
6. Step 6: Final answer
   x = 11,948.18