Finding the Fourth Proportional to 1,089.72, 1,631.76 and 601.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.72 : 1,631.76 = 601.76 : x
2. Step 2: Convert to fraction form
   1,089.72/1,631.76 = 601.76/x
3. Step 3: Cross multiply
   1,089.72x = 1,631.76 × 601.76
4. Step 4: Simplify right side
   1,089.72x = 981,927.90
5. Step 5: Solve for x
   x = 981,927.90/1,089.72
6. Step 6: Final answer
   x = 901.08