Finding the Fourth Proportional to 13,547.19, 18,695.52 and 7,578.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,547.19 : 18,695.52 = 7,578.72 : x
2. Step 2: Convert to fraction form
   13,547.19/18,695.52 = 7,578.72/x
3. Step 3: Cross multiply
   13,547.19x = 18,695.52 × 7,578.72
4. Step 4: Simplify right side
   13,547.19x = 141,688,111.33
5. Step 5: Solve for x
   x = 141,688,111.33/13,547.19
6. Step 6: Final answer
   x = 10,458.86