Finding the Fourth Proportional to 1,783.31, 2,461.83 and 1,186.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.31 : 2,461.83 = 1,186.79 : x
2. Step 2: Convert to fraction form
   1,783.31/2,461.83 = 1,186.79/x
3. Step 3: Cross multiply
   1,783.31x = 2,461.83 × 1,186.79
4. Step 4: Simplify right side
   1,783.31x = 2,921,679.24
5. Step 5: Solve for x
   x = 2,921,679.24/1,783.31
6. Step 6: Final answer
   x = 1,638.35