Finding the Fourth Proportional to 1,561.49, 2,341.98 and 522.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.49 : 2,341.98 = 522.21 : x
2. Step 2: Convert to fraction form
   1,561.49/2,341.98 = 522.21/x
3. Step 3: Cross multiply
   1,561.49x = 2,341.98 × 522.21
4. Step 4: Simplify right side
   1,561.49x = 1,223,005.38
5. Step 5: Solve for x
   x = 1,223,005.38/1,561.49
6. Step 6: Final answer
   x = 783.23