Finding the Fourth Proportional to 9,931.82, 14,897.55 and 8,381.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.82 : 14,897.55 = 8,381.78 : x
2. Step 2: Convert to fraction form
   9,931.82/14,897.55 = 8,381.78/x
3. Step 3: Cross multiply
   9,931.82x = 14,897.55 × 8,381.78
4. Step 4: Simplify right side
   9,931.82x = 124,867,986.64
5. Step 5: Solve for x
   x = 124,867,986.64/9,931.82
6. Step 6: Final answer
   x = 12,572.52