Finding the Fourth Proportional to 1,672.34, 2,505.69 and 576.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.34 : 2,505.69 = 576.09 : x
2. Step 2: Convert to fraction form
   1,672.34/2,505.69 = 576.09/x
3. Step 3: Cross multiply
   1,672.34x = 2,505.69 × 576.09
4. Step 4: Simplify right side
   1,672.34x = 1,443,502.95
5. Step 5: Solve for x
   x = 1,443,502.95/1,672.34
6. Step 6: Final answer
   x = 863.17