Finding the Fourth Proportional to 2,230.71, 3,345.12 and 913.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,230.71 : 3,345.12 = 913.56 : x
2. Step 2: Convert to fraction form
   2,230.71/3,345.12 = 913.56/x
3. Step 3: Cross multiply
   2,230.71x = 3,345.12 × 913.56
4. Step 4: Simplify right side
   2,230.71x = 3,055,967.83
5. Step 5: Solve for x
   x = 3,055,967.83/2,230.71
6. Step 6: Final answer
   x = 1,369.95