Finding the Fourth Proportional to 11,111.98, 15,327.30 and 7,126.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,111.98 : 15,327.30 = 7,126.78 : x
2. Step 2: Convert to fraction form
   11,111.98/15,327.30 = 7,126.78/x
3. Step 3: Cross multiply
   11,111.98x = 15,327.30 × 7,126.78
4. Step 4: Simplify right side
   11,111.98x = 109,234,283.50
5. Step 5: Solve for x
   x = 109,234,283.50/11,111.98
6. Step 6: Final answer
   x = 9,830.32