Finding the Fourth Proportional to 1,356.58, 1,871.95 and 1,002.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.58 : 1,871.95 = 1,002.72 : x
2. Step 2: Convert to fraction form
   1,356.58/1,871.95 = 1,002.72/x
3. Step 3: Cross multiply
   1,356.58x = 1,871.95 × 1,002.72
4. Step 4: Simplify right side
   1,356.58x = 1,877,041.70
5. Step 5: Solve for x
   x = 1,877,041.70/1,356.58
6. Step 6: Final answer
   x = 1,383.66