Finding the Fourth Proportional to 1,342.06, 1,851.53 and 869.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.06 : 1,851.53 = 869.79 : x
2. Step 2: Convert to fraction form
   1,342.06/1,851.53 = 869.79/x
3. Step 3: Cross multiply
   1,342.06x = 1,851.53 × 869.79
4. Step 4: Simplify right side
   1,342.06x = 1,610,444.45
5. Step 5: Solve for x
   x = 1,610,444.45/1,342.06
6. Step 6: Final answer
   x = 1,199.98