Finding the Fourth Proportional to 1,200.83, 1,801.21 and 847.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.83 : 1,801.21 = 847.99 : x
2. Step 2: Convert to fraction form
   1,200.83/1,801.21 = 847.99/x
3. Step 3: Cross multiply
   1,200.83x = 1,801.21 × 847.99
4. Step 4: Simplify right side
   1,200.83x = 1,527,403.83
5. Step 5: Solve for x
   x = 1,527,403.83/1,200.83
6. Step 6: Final answer
   x = 1,271.96