Finding the Fourth Proportional to 1,774.47, 2,448.81 and 988.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,774.47 : 2,448.81 = 988.50 : x
2. Step 2: Convert to fraction form
   1,774.47/2,448.81 = 988.50/x
3. Step 3: Cross multiply
   1,774.47x = 2,448.81 × 988.50
4. Step 4: Simplify right side
   1,774.47x = 2,420,648.69
5. Step 5: Solve for x
   x = 2,420,648.69/1,774.47
6. Step 6: Final answer
   x = 1,364.15