Finding the Fourth Proportional to 1,341.86, 1,851.32 and 870.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.86 : 1,851.32 = 870.37 : x
2. Step 2: Convert to fraction form
   1,341.86/1,851.32 = 870.37/x
3. Step 3: Cross multiply
   1,341.86x = 1,851.32 × 870.37
4. Step 4: Simplify right side
   1,341.86x = 1,611,336.45
5. Step 5: Solve for x
   x = 1,611,336.45/1,341.86
6. Step 6: Final answer
   x = 1,200.82