Finding the Fourth Proportional to 1,378.52, 1,903.05 and 1,130.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.52 : 1,903.05 = 1,130.39 : x
2. Step 2: Convert to fraction form
   1,378.52/1,903.05 = 1,130.39/x
3. Step 3: Cross multiply
   1,378.52x = 1,903.05 × 1,130.39
4. Step 4: Simplify right side
   1,378.52x = 2,151,179.17
5. Step 5: Solve for x
   x = 2,151,179.17/1,378.52
6. Step 6: Final answer
   x = 1,560.50