Finding the Fourth Proportional to 772,552.28, 1,066,134.91 and 428,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   772,552.28 : 1,066,134.91 = 428,402.72 : x
2. Step 2: Convert to fraction form
   772,552.28/1,066,134.91 = 428,402.72/x
3. Step 3: Cross multiply
   772,552.28x = 1,066,134.91 × 428,402.72
4. Step 4: Simplify right side
   772,552.28x = 456,735,097,728.54
5. Step 5: Solve for x
   x = 456,735,097,728.54/772,552.28
6. Step 6: Final answer
   x = 591,202.83