Finding the Fourth Proportional to 1,773.46, 2,447.40 and 987.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.46 : 2,447.40 = 987.61 : x
2. Step 2: Convert to fraction form
   1,773.46/2,447.40 = 987.61/x
3. Step 3: Cross multiply
   1,773.46x = 2,447.40 × 987.61
4. Step 4: Simplify right side
   1,773.46x = 2,417,076.71
5. Step 5: Solve for x
   x = 2,417,076.71/1,773.46
6. Step 6: Final answer
   x = 1,362.92