Finding the Fourth Proportional to 814,105.56, 1,122,168.01 and 641,742.62

Step by Step Solution

1. Step 1: Write the proportion equation
   814,105.56 : 1,122,168.01 = 641,742.62 : x
2. Step 2: Convert to fraction form
   814,105.56/1,122,168.01 = 641,742.62/x
3. Step 3: Cross multiply
   814,105.56x = 1,122,168.01 × 641,742.62
4. Step 4: Simplify right side
   814,105.56x = 720,143,038,817.59
5. Step 5: Solve for x
   x = 720,143,038,817.59/814,105.56
6. Step 6: Final answer
   x = 884,581.89