Finding the Fourth Proportional to 813,870.52, 1,122,912.24 and 641,253.34

Step by Step Solution

1. Step 1: Write the proportion equation
   813,870.52 : 1,122,912.24 = 641,253.34 : x
2. Step 2: Convert to fraction form
   813,870.52/1,122,912.24 = 641,253.34/x
3. Step 3: Cross multiply
   813,870.52x = 1,122,912.24 × 641,253.34
4. Step 4: Simplify right side
   813,870.52x = 720,071,224,426.88
5. Step 5: Solve for x
   x = 720,071,224,426.88/813,870.52
6. Step 6: Final answer
   x = 884,749.12