Finding the Fourth Proportional to 1,219,588.75, 1,683,617.52 and 857,323.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219,588.75 : 1,683,617.52 = 857,323.15 : x
2. Step 2: Convert to fraction form
   1,219,588.75/1,683,617.52 = 857,323.15/x
3. Step 3: Cross multiply
   1,219,588.75x = 1,683,617.52 × 857,323.15
4. Step 4: Simplify right side
   1,219,588.75x = 1,443,404,275,641.59
5. Step 5: Solve for x
   x = 1,443,404,275,641.59/1,219,588.75
6. Step 6: Final answer
   x = 1,183,517.21