Finding the Fourth Proportional to 1,773.34, 2,447.31 and 987.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.34 : 2,447.31 = 987.31 : x
2. Step 2: Convert to fraction form
   1,773.34/2,447.31 = 987.31/x
3. Step 3: Cross multiply
   1,773.34x = 2,447.31 × 987.31
4. Step 4: Simplify right side
   1,773.34x = 2,416,253.64
5. Step 5: Solve for x
   x = 2,416,253.64/1,773.34
6. Step 6: Final answer
   x = 1,362.54