Finding the Fourth Proportional to 1,767.86, 2,439.79 and 981.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,767.86 : 2,439.79 = 981.98 : x
2. Step 2: Convert to fraction form
   1,767.86/2,439.79 = 981.98/x
3. Step 3: Cross multiply
   1,767.86x = 2,439.79 × 981.98
4. Step 4: Simplify right side
   1,767.86x = 2,395,810.33
5. Step 5: Solve for x
   x = 2,395,810.33/1,767.86
6. Step 6: Final answer
   x = 1,355.21