Finding the Fourth Proportional to 1,407.10, 1,942.32 and 847.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.10 : 1,942.32 = 847.60 : x
2. Step 2: Convert to fraction form
   1,407.10/1,942.32 = 847.60/x
3. Step 3: Cross multiply
   1,407.10x = 1,942.32 × 847.60
4. Step 4: Simplify right side
   1,407.10x = 1,646,310.43
5. Step 5: Solve for x
   x = 1,646,310.43/1,407.10
6. Step 6: Final answer
   x = 1,170.00