Finding the Fourth Proportional to 13,031.16, 19,547.82 and 7,191.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,031.16 : 19,547.82 = 7,191.78 : x
2. Step 2: Convert to fraction form
   13,031.16/19,547.82 = 7,191.78/x
3. Step 3: Cross multiply
   13,031.16x = 19,547.82 × 7,191.78
4. Step 4: Simplify right side
   13,031.16x = 140,583,620.92
5. Step 5: Solve for x
   x = 140,583,620.92/13,031.16
6. Step 6: Final answer
   x = 10,788.27