Finding the Fourth Proportional to 2,870.49, 3,960.06 and 1,807.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.49 : 3,960.06 = 1,807.86 : x
2. Step 2: Convert to fraction form
   2,870.49/3,960.06 = 1,807.86/x
3. Step 3: Cross multiply
   2,870.49x = 3,960.06 × 1,807.86
4. Step 4: Simplify right side
   2,870.49x = 7,159,234.07
5. Step 5: Solve for x
   x = 7,159,234.07/2,870.49
6. Step 6: Final answer
   x = 2,494.08