Finding the Fourth Proportional to 1,627.51, 2,245.83 and 997.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.51 : 2,245.83 = 997.78 : x
2. Step 2: Convert to fraction form
   1,627.51/2,245.83 = 997.78/x
3. Step 3: Cross multiply
   1,627.51x = 2,245.83 × 997.78
4. Step 4: Simplify right side
   1,627.51x = 2,240,844.26
5. Step 5: Solve for x
   x = 2,240,844.26/1,627.51
6. Step 6: Final answer
   x = 1,376.85