Finding the Fourth Proportional to 1,336.77, 1,842.57 and 1,056.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.77 : 1,842.57 = 1,056.51 : x
2. Step 2: Convert to fraction form
   1,336.77/1,842.57 = 1,056.51/x
3. Step 3: Cross multiply
   1,336.77x = 1,842.57 × 1,056.51
4. Step 4: Simplify right side
   1,336.77x = 1,946,693.63
5. Step 5: Solve for x
   x = 1,946,693.63/1,336.77
6. Step 6: Final answer
   x = 1,456.27