Finding the Fourth Proportional to 1,445.85, 2,167.83 and 715.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.85 : 2,167.83 = 715.91 : x
2. Step 2: Convert to fraction form
   1,445.85/2,167.83 = 715.91/x
3. Step 3: Cross multiply
   1,445.85x = 2,167.83 × 715.91
4. Step 4: Simplify right side
   1,445.85x = 1,551,960.34
5. Step 5: Solve for x
   x = 1,551,960.34/1,445.85
6. Step 6: Final answer
   x = 1,073.39