Finding the Fourth Proportional to 1,275.89, 1,914.03 and 545.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.89 : 1,914.03 = 545.00 : x
2. Step 2: Convert to fraction form
   1,275.89/1,914.03 = 545.00/x
3. Step 3: Cross multiply
   1,275.89x = 1,914.03 × 545.00
4. Step 4: Simplify right side
   1,275.89x = 1,043,136.78
5. Step 5: Solve for x
   x = 1,043,136.78/1,275.89
6. Step 6: Final answer
   x = 817.58