Finding the Fourth Proportional to 1,061.30, 1,590.60 and 541.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.30 : 1,590.60 = 541.43 : x
2. Step 2: Convert to fraction form
   1,061.30/1,590.60 = 541.43/x
3. Step 3: Cross multiply
   1,061.30x = 1,590.60 × 541.43
4. Step 4: Simplify right side
   1,061.30x = 861,190.61
5. Step 5: Solve for x
   x = 861,190.61/1,061.30
6. Step 6: Final answer
   x = 811.45