Finding the Fourth Proportional to 1,987.06, 2,978.79 and 832.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.06 : 2,978.79 = 832.18 : x
2. Step 2: Convert to fraction form
   1,987.06/2,978.79 = 832.18/x
3. Step 3: Cross multiply
   1,987.06x = 2,978.79 × 832.18
4. Step 4: Simplify right side
   1,987.06x = 2,478,889.46
5. Step 5: Solve for x
   x = 2,478,889.46/1,987.06
6. Step 6: Final answer
   x = 1,247.52