Finding the Fourth Proportional to 11,870.84, 16,381.86 and 7,154.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870.84 : 16,381.86 = 7,154.12 : x
2. Step 2: Convert to fraction form
   11,870.84/16,381.86 = 7,154.12/x
3. Step 3: Cross multiply
   11,870.84x = 16,381.86 × 7,154.12
4. Step 4: Simplify right side
   11,870.84x = 117,197,792.26
5. Step 5: Solve for x
   x = 117,197,792.26/11,870.84
6. Step 6: Final answer
   x = 9,872.75