Finding the Fourth Proportional to 1,355.60, 2,030.70 and 738.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.60 : 2,030.70 = 738.38 : x
2. Step 2: Convert to fraction form
   1,355.60/2,030.70 = 738.38/x
3. Step 3: Cross multiply
   1,355.60x = 2,030.70 × 738.38
4. Step 4: Simplify right side
   1,355.60x = 1,499,428.27
5. Step 5: Solve for x
   x = 1,499,428.27/1,355.60
6. Step 6: Final answer
   x = 1,106.10