Finding the Fourth Proportional to 817,679.82, 1,128,386.82 and 455,103.81

Step by Step Solution

1. Step 1: Write the proportion equation
   817,679.82 : 1,128,386.82 = 455,103.81 : x
2. Step 2: Convert to fraction form
   817,679.82/1,128,386.82 = 455,103.81/x
3. Step 3: Cross multiply
   817,679.82x = 1,128,386.82 × 455,103.81
4. Step 4: Simplify right side
   817,679.82x = 513,533,140,935.78
5. Step 5: Solve for x
   x = 513,533,140,935.78/817,679.82
6. Step 6: Final answer
   x = 628,036.95