Finding the Fourth Proportional to 2,373.95, 3,560.55 and 813.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,373.95 : 3,560.55 = 813.89 : x
2. Step 2: Convert to fraction form
   2,373.95/3,560.55 = 813.89/x
3. Step 3: Cross multiply
   2,373.95x = 3,560.55 × 813.89
4. Step 4: Simplify right side
   2,373.95x = 2,897,901.89
5. Step 5: Solve for x
   x = 2,897,901.89/2,373.95
6. Step 6: Final answer
   x = 1,220.71