Finding the Fourth Proportional to 8,740, 12,061.86 and 5,381.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,740 : 12,061.86 = 5,381.98 : x
2. Step 2: Convert to fraction form
   8,740/12,061.86 = 5,381.98/x
3. Step 3: Cross multiply
   8,740x = 12,061.86 × 5,381.98
4. Step 4: Simplify right side
   8,740x = 64,916,689.28
5. Step 5: Solve for x
   x = 64,916,689.28/8,740
6. Step 6: Final answer
   x = 7,427.54