Finding the Fourth Proportional to 9,947.78, 14,889.21 and 7,314.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.78 : 14,889.21 = 7,314.59 : x
2. Step 2: Convert to fraction form
   9,947.78/14,889.21 = 7,314.59/x
3. Step 3: Cross multiply
   9,947.78x = 14,889.21 × 7,314.59
4. Step 4: Simplify right side
   9,947.78x = 108,908,466.57
5. Step 5: Solve for x
   x = 108,908,466.57/9,947.78
6. Step 6: Final answer
   x = 10,948.02