Finding the Fourth Proportional to 1,061.59, 1,590.94 and 548.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.59 : 1,590.94 = 548.95 : x
2. Step 2: Convert to fraction form
   1,061.59/1,590.94 = 548.95/x
3. Step 3: Cross multiply
   1,061.59x = 1,590.94 × 548.95
4. Step 4: Simplify right side
   1,061.59x = 873,346.51
5. Step 5: Solve for x
   x = 873,346.51/1,061.59
6. Step 6: Final answer
   x = 822.68