Finding the Fourth Proportional to 4,187.31, 6,280.52 and 2,106.47

Step by Step Solution

1. Step 1: Write the proportion equation
   4,187.31 : 6,280.52 = 2,106.47 : x
2. Step 2: Convert to fraction form
   4,187.31/6,280.52 = 2,106.47/x
3. Step 3: Cross multiply
   4,187.31x = 6,280.52 × 2,106.47
4. Step 4: Simplify right side
   4,187.31x = 13,229,700.83
5. Step 5: Solve for x
   x = 13,229,700.83/4,187.31
6. Step 6: Final answer
   x = 3,159.47