Finding the Fourth Proportional to 12,776.76, 19,168.02 and 3,892.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.76 : 19,168.02 = 3,892.88 : x
2. Step 2: Convert to fraction form
   12,776.76/19,168.02 = 3,892.88/x
3. Step 3: Cross multiply
   12,776.76x = 19,168.02 × 3,892.88
4. Step 4: Simplify right side
   12,776.76x = 74,618,801.70
5. Step 5: Solve for x
   x = 74,618,801.70/12,776.76
6. Step 6: Final answer
   x = 5,840.20