Finding the Fourth Proportional to 1,773.50, 2,447.15 and 987.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.50 : 2,447.15 = 987.39 : x
2. Step 2: Convert to fraction form
   1,773.50/2,447.15 = 987.39/x
3. Step 3: Cross multiply
   1,773.50x = 2,447.15 × 987.39
4. Step 4: Simplify right side
   1,773.50x = 2,416,286.50
5. Step 5: Solve for x
   x = 2,416,286.50/1,773.50
6. Step 6: Final answer
   x = 1,362.44