Finding the Fourth Proportional to 1,351.39, 1,864.78 and 997.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.39 : 1,864.78 = 997.50 : x
2. Step 2: Convert to fraction form
   1,351.39/1,864.78 = 997.50/x
3. Step 3: Cross multiply
   1,351.39x = 1,864.78 × 997.50
4. Step 4: Simplify right side
   1,351.39x = 1,860,124.66
5. Step 5: Solve for x
   x = 1,860,124.66/1,351.39
6. Step 6: Final answer
   x = 1,376.45