Finding the Fourth Proportional to 3,931.79, 5,892.46 and 2,886.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.79 : 5,892.46 = 2,886.89 : x
2. Step 2: Convert to fraction form
   3,931.79/5,892.46 = 2,886.89/x
3. Step 3: Cross multiply
   3,931.79x = 5,892.46 × 2,886.89
4. Step 4: Simplify right side
   3,931.79x = 17,010,847.17
5. Step 5: Solve for x
   x = 17,010,847.17/3,931.79
6. Step 6: Final answer
   x = 4,326.49