Finding the Fourth Proportional to 845,103.15, 1,268,152.94 and 312,997.86

Step by Step Solution

1. Step 1: Write the proportion equation
   845,103.15 : 1,268,152.94 = 312,997.86 : x
2. Step 2: Convert to fraction form
   845,103.15/1,268,152.94 = 312,997.86/x
3. Step 3: Cross multiply
   845,103.15x = 1,268,152.94 × 312,997.86
4. Step 4: Simplify right side
   845,103.15x = 396,929,154,807.72
5. Step 5: Solve for x
   x = 396,929,154,807.72/845,103.15
6. Step 6: Final answer
   x = 469,681.31