Finding the Fourth Proportional to 765,216.28, 1,056,113.94 and 443,136.76

Step by Step Solution

1. Step 1: Write the proportion equation
   765,216.28 : 1,056,113.94 = 443,136.76 : x
2. Step 2: Convert to fraction form
   765,216.28/1,056,113.94 = 443,136.76/x
3. Step 3: Cross multiply
   765,216.28x = 1,056,113.94 × 443,136.76
4. Step 4: Simplify right side
   765,216.28x = 468,002,909,562.43
5. Step 5: Solve for x
   x = 468,002,909,562.43/765,216.28
6. Step 6: Final answer
   x = 611,595.60