Finding the Fourth Proportional to 816,410.16, 1,126,659.42 and 448,902.72

Step by Step Solution

1. Step 1: Write the proportion equation
   816,410.16 : 1,126,659.42 = 448,902.72 : x
2. Step 2: Convert to fraction form
   816,410.16/1,126,659.42 = 448,902.72/x
3. Step 3: Cross multiply
   816,410.16x = 1,126,659.42 × 448,902.72
4. Step 4: Simplify right side
   816,410.16x = 505,760,478,151.62
5. Step 5: Solve for x
   x = 505,760,478,151.62/816,410.16
6. Step 6: Final answer
   x = 619,493.12