Finding the Fourth Proportional to 1,342.37, 1,851.86 and 870.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.37 : 1,851.86 = 870.44 : x
2. Step 2: Convert to fraction form
   1,342.37/1,851.86 = 870.44/x
3. Step 3: Cross multiply
   1,342.37x = 1,851.86 × 870.44
4. Step 4: Simplify right side
   1,342.37x = 1,611,925.94
5. Step 5: Solve for x
   x = 1,611,925.94/1,342.37
6. Step 6: Final answer
   x = 1,200.80