Finding the Fourth Proportional to 687,623.00, 1,031,433.57 and 261,158.00

Step by Step Solution

1. Step 1: Write the proportion equation
   687,623.00 : 1,031,433.57 = 261,158.00 : x
2. Step 2: Convert to fraction form
   687,623.00/1,031,433.57 = 261,158.00/x
3. Step 3: Cross multiply
   687,623.00x = 1,031,433.57 × 261,158.00
4. Step 4: Simplify right side
   687,623.00x = 269,367,123,116.89
5. Step 5: Solve for x
   x = 269,367,123,116.89/687,623.00
6. Step 6: Final answer
   x = 391,736.64