Finding the Fourth Proportional to 11,875.78, 16,388.49 and 6,570.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,875.78 : 16,388.49 = 6,570.47 : x
2. Step 2: Convert to fraction form
   11,875.78/16,388.49 = 6,570.47/x
3. Step 3: Cross multiply
   11,875.78x = 16,388.49 × 6,570.47
4. Step 4: Simplify right side
   11,875.78x = 107,680,081.89
5. Step 5: Solve for x
   x = 107,680,081.89/11,875.78
6. Step 6: Final answer
   x = 9,067.20