Finding the Fourth Proportional to 1,478.81, 2,219.43 and 748.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.81 : 2,219.43 = 748.59 : x
2. Step 2: Convert to fraction form
   1,478.81/2,219.43 = 748.59/x
3. Step 3: Cross multiply
   1,478.81x = 2,219.43 × 748.59
4. Step 4: Simplify right side
   1,478.81x = 1,661,443.76
5. Step 5: Solve for x
   x = 1,661,443.76/1,478.81
6. Step 6: Final answer
   x = 1,123.50