Finding the Fourth Proportional to 1,913.33, 2,870.06 and 614.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.33 : 2,870.06 = 614.63 : x
2. Step 2: Convert to fraction form
   1,913.33/2,870.06 = 614.63/x
3. Step 3: Cross multiply
   1,913.33x = 2,870.06 × 614.63
4. Step 4: Simplify right side
   1,913.33x = 1,764,007.55
5. Step 5: Solve for x
   x = 1,764,007.55/1,913.33
6. Step 6: Final answer
   x = 921.96