Finding the Fourth Proportional to 752.91, 1,123.59 and 670.91

Step by Step Solution

1. Step 1: Write the proportion equation
   752.91 : 1,123.59 = 670.91 : x
2. Step 2: Convert to fraction form
   752.91/1,123.59 = 670.91/x
3. Step 3: Cross multiply
   752.91x = 1,123.59 × 670.91
4. Step 4: Simplify right side
   752.91x = 753,822.15
5. Step 5: Solve for x
   x = 753,822.15/752.91
6. Step 6: Final answer
   x = 1,001.21