Finding the Fourth Proportional to 1,601.33, 2,402.12 and 561.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.33 : 2,402.12 = 561.30 : x
2. Step 2: Convert to fraction form
   1,601.33/2,402.12 = 561.30/x
3. Step 3: Cross multiply
   1,601.33x = 2,402.12 × 561.30
4. Step 4: Simplify right side
   1,601.33x = 1,348,307.15
5. Step 5: Solve for x
   x = 1,348,307.15/1,601.33
6. Step 6: Final answer
   x = 841.99