Finding the Fourth Proportional to 1,238.35, 1,707.43 and 1,070.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.35 : 1,707.43 = 1,070.00 : x
2. Step 2: Convert to fraction form
   1,238.35/1,707.43 = 1,070.00/x
3. Step 3: Cross multiply
   1,238.35x = 1,707.43 × 1,070.00
4. Step 4: Simplify right side
   1,238.35x = 1,826,944.90
5. Step 5: Solve for x
   x = 1,826,944.90/1,238.35
6. Step 6: Final answer
   x = 1,475.30