Finding the Fourth Proportional to 772,581.43, 1,066,142.71 and 428,411.88

Step by Step Solution

1. Step 1: Write the proportion equation
   772,581.43 : 1,066,142.71 = 428,411.88 : x
2. Step 2: Convert to fraction form
   772,581.43/1,066,142.71 = 428,411.88/x
3. Step 3: Cross multiply
   772,581.43x = 1,066,142.71 × 428,411.88
4. Step 4: Simplify right side
   772,581.43x = 456,748,202,739.40
5. Step 5: Solve for x
   x = 456,748,202,739.40/772,581.43
6. Step 6: Final answer
   x = 591,197.49