Finding the Fourth Proportional to 2,045.72, 3,068.86 and 813.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.72 : 3,068.86 = 813.25 : x
2. Step 2: Convert to fraction form
   2,045.72/3,068.86 = 813.25/x
3. Step 3: Cross multiply
   2,045.72x = 3,068.86 × 813.25
4. Step 4: Simplify right side
   2,045.72x = 2,495,750.40
5. Step 5: Solve for x
   x = 2,495,750.40/2,045.72
6. Step 6: Final answer
   x = 1,219.99