Finding the Fourth Proportional to 1,070.07, 1,475.78 and 805.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.07 : 1,475.78 = 805.15 : x
2. Step 2: Convert to fraction form
   1,070.07/1,475.78 = 805.15/x
3. Step 3: Cross multiply
   1,070.07x = 1,475.78 × 805.15
4. Step 4: Simplify right side
   1,070.07x = 1,188,224.27
5. Step 5: Solve for x
   x = 1,188,224.27/1,070.07
6. Step 6: Final answer
   x = 1,110.42