Finding the Fourth Proportional to 1,451.62, 2,179.47 and 1,385.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.62 : 2,179.47 = 1,385.57 : x
2. Step 2: Convert to fraction form
   1,451.62/2,179.47 = 1,385.57/x
3. Step 3: Cross multiply
   1,451.62x = 2,179.47 × 1,385.57
4. Step 4: Simplify right side
   1,451.62x = 3,019,818.89
5. Step 5: Solve for x
   x = 3,019,818.89/1,451.62
6. Step 6: Final answer
   x = 2,080.31