Finding the Fourth Proportional to 1,008.59, 1,513.34 and 545.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.59 : 1,513.34 = 545.87 : x
2. Step 2: Convert to fraction form
   1,008.59/1,513.34 = 545.87/x
3. Step 3: Cross multiply
   1,008.59x = 1,513.34 × 545.87
4. Step 4: Simplify right side
   1,008.59x = 826,090.01
5. Step 5: Solve for x
   x = 826,090.01/1,008.59
6. Step 6: Final answer
   x = 819.06