Finding the Fourth Proportional to 3,967.84, 5,476.88 and 2,312.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.84 : 5,476.88 = 2,312.16 : x
2. Step 2: Convert to fraction form
   3,967.84/5,476.88 = 2,312.16/x
3. Step 3: Cross multiply
   3,967.84x = 5,476.88 × 2,312.16
4. Step 4: Simplify right side
   3,967.84x = 12,663,422.86
5. Step 5: Solve for x
   x = 12,663,422.86/3,967.84
6. Step 6: Final answer
   x = 3,191.52