Finding the Fourth Proportional to 1,201.25, 1,657.69 and 670.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,201.25 : 1,657.69 = 670.23 : x
2. Step 2: Convert to fraction form
   1,201.25/1,657.69 = 670.23/x
3. Step 3: Cross multiply
   1,201.25x = 1,657.69 × 670.23
4. Step 4: Simplify right side
   1,201.25x = 1,111,031.89
5. Step 5: Solve for x
   x = 1,111,031.89/1,201.25
6. Step 6: Final answer
   x = 924.89