Finding the Fourth Proportional to 817,796.10, 1,128,591.77 and 455,196.96

Step by Step Solution

1. Step 1: Write the proportion equation
   817,796.10 : 1,128,591.77 = 455,196.96 : x
2. Step 2: Convert to fraction form
   817,796.10/1,128,591.77 = 455,196.96/x
3. Step 3: Cross multiply
   817,796.10x = 1,128,591.77 × 455,196.96
4. Step 4: Simplify right side
   817,796.10x = 513,731,540,509.03
5. Step 5: Solve for x
   x = 513,731,540,509.03/817,796.10
6. Step 6: Final answer
   x = 628,190.25