Finding the Fourth Proportional to 1,570.86, 2,356.83 and 748.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.86 : 2,356.83 = 748.71 : x
2. Step 2: Convert to fraction form
   1,570.86/2,356.83 = 748.71/x
3. Step 3: Cross multiply
   1,570.86x = 2,356.83 × 748.71
4. Step 4: Simplify right side
   1,570.86x = 1,764,582.19
5. Step 5: Solve for x
   x = 1,764,582.19/1,570.86
6. Step 6: Final answer
   x = 1,123.32