Finding the Fourth Proportional to 1,778.01, 2,667.39 and 545.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.01 : 2,667.39 = 545.50 : x
2. Step 2: Convert to fraction form
   1,778.01/2,667.39 = 545.50/x
3. Step 3: Cross multiply
   1,778.01x = 2,667.39 × 545.50
4. Step 4: Simplify right side
   1,778.01x = 1,455,061.25
5. Step 5: Solve for x
   x = 1,455,061.25/1,778.01
6. Step 6: Final answer
   x = 818.37