Finding the Fourth Proportional to 711,443.78, 982,123.28 and 420,964.01

Step by Step Solution

1. Step 1: Write the proportion equation
   711,443.78 : 982,123.28 = 420,964.01 : x
2. Step 2: Convert to fraction form
   711,443.78/982,123.28 = 420,964.01/x
3. Step 3: Cross multiply
   711,443.78x = 982,123.28 × 420,964.01
4. Step 4: Simplify right side
   711,443.78x = 413,438,547,247.72
5. Step 5: Solve for x
   x = 413,438,547,247.72/711,443.78
6. Step 6: Final answer
   x = 581,126.10