Finding the Fourth Proportional to 1,342.04, 1,851.58 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.04 : 1,851.58 = 870.30 : x
2. Step 2: Convert to fraction form
   1,342.04/1,851.58 = 870.30/x
3. Step 3: Cross multiply
   1,342.04x = 1,851.58 × 870.30
4. Step 4: Simplify right side
   1,342.04x = 1,611,430.07
5. Step 5: Solve for x
   x = 1,611,430.07/1,342.04
6. Step 6: Final answer
   x = 1,200.73