Finding the Fourth Proportional to 1,258.80, 1,885.32 and 744.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.80 : 1,885.32 = 744.72 : x
2. Step 2: Convert to fraction form
   1,258.80/1,885.32 = 744.72/x
3. Step 3: Cross multiply
   1,258.80x = 1,885.32 × 744.72
4. Step 4: Simplify right side
   1,258.80x = 1,404,035.51
5. Step 5: Solve for x
   x = 1,404,035.51/1,258.80
6. Step 6: Final answer
   x = 1,115.38