Finding the Fourth Proportional to 1,018,764.56, 1,406,326.12 and 687,692.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,764.56 : 1,406,326.12 = 687,692.72 : x
2. Step 2: Convert to fraction form
   1,018,764.56/1,406,326.12 = 687,692.72/x
3. Step 3: Cross multiply
   1,018,764.56x = 1,406,326.12 × 687,692.72
4. Step 4: Simplify right side
   1,018,764.56x = 967,120,234,669.85
5. Step 5: Solve for x
   x = 967,120,234,669.85/1,018,764.56
6. Step 6: Final answer
   x = 949,306.91