Finding the Fourth Proportional to 1,061.03, 1,590.59 and 540.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.03 : 1,590.59 = 540.74 : x
2. Step 2: Convert to fraction form
   1,061.03/1,590.59 = 540.74/x
3. Step 3: Cross multiply
   1,061.03x = 1,590.59 × 540.74
4. Step 4: Simplify right side
   1,061.03x = 860,095.64
5. Step 5: Solve for x
   x = 860,095.64/1,061.03
6. Step 6: Final answer
   x = 810.62