Finding the Fourth Proportional to 1,061.40, 1,590.66 and 598.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.40 : 1,590.66 = 598.95 : x
2. Step 2: Convert to fraction form
   1,061.40/1,590.66 = 598.95/x
3. Step 3: Cross multiply
   1,061.40x = 1,590.66 × 598.95
4. Step 4: Simplify right side
   1,061.40x = 952,725.81
5. Step 5: Solve for x
   x = 952,725.81/1,061.40
6. Step 6: Final answer
   x = 897.61