Finding the Fourth Proportional to 805,640.78, 1,111,762.06 and 443,064.60

Step by Step Solution

1. Step 1: Write the proportion equation
   805,640.78 : 1,111,762.06 = 443,064.60 : x
2. Step 2: Convert to fraction form
   805,640.78/1,111,762.06 = 443,064.60/x
3. Step 3: Cross multiply
   805,640.78x = 1,111,762.06 × 443,064.60
4. Step 4: Simplify right side
   805,640.78x = 492,582,411,301.42
5. Step 5: Solve for x
   x = 492,582,411,301.42/805,640.78
6. Step 6: Final answer
   x = 611,416.93