Finding the Fourth Proportional to 1,054.35, 1,455.57 and 740.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.35 : 1,455.57 = 740.07 : x
2. Step 2: Convert to fraction form
   1,054.35/1,455.57 = 740.07/x
3. Step 3: Cross multiply
   1,054.35x = 1,455.57 × 740.07
4. Step 4: Simplify right side
   1,054.35x = 1,077,223.69
5. Step 5: Solve for x
   x = 1,077,223.69/1,054.35
6. Step 6: Final answer
   x = 1,021.69