Finding the Fourth Proportional to 687,898.98, 1,031,061.15 and 266,814

Step by Step Solution

1. Step 1: Write the proportion equation
   687,898.98 : 1,031,061.15 = 266,814 : x
2. Step 2: Convert to fraction form
   687,898.98/1,031,061.15 = 266,814/x
3. Step 3: Cross multiply
   687,898.98x = 1,031,061.15 × 266,814
4. Step 4: Simplify right side
   687,898.98x = 275,101,549,676.10
5. Step 5: Solve for x
   x = 275,101,549,676.10/687,898.98
6. Step 6: Final answer
   x = 399,915.62