Finding the Fourth Proportional to 1,370.68, 1,889.06 and 1,038.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.68 : 1,889.06 = 1,038.28 : x
2. Step 2: Convert to fraction form
   1,370.68/1,889.06 = 1,038.28/x
3. Step 3: Cross multiply
   1,370.68x = 1,889.06 × 1,038.28
4. Step 4: Simplify right side
   1,370.68x = 1,961,373.22
5. Step 5: Solve for x
   x = 1,961,373.22/1,370.68
6. Step 6: Final answer
   x = 1,430.95