Finding the Fourth Proportional to 810,409, 1,215,665.34 and 311,773

Step by Step Solution

1. Step 1: Write the proportion equation
   810,409 : 1,215,665.34 = 311,773 : x
2. Step 2: Convert to fraction form
   810,409/1,215,665.34 = 311,773/x
3. Step 3: Cross multiply
   810,409x = 1,215,665.34 × 311,773
4. Step 4: Simplify right side
   810,409x = 379,011,630,047.82
5. Step 5: Solve for x
   x = 379,011,630,047.82/810,409
6. Step 6: Final answer
   x = 467,679.44