Finding the Fourth Proportional to 1,940.72, 2,678.18 and 1,056.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,940.72 : 2,678.18 = 1,056.51 : x
2. Step 2: Convert to fraction form
   1,940.72/2,678.18 = 1,056.51/x
3. Step 3: Cross multiply
   1,940.72x = 2,678.18 × 1,056.51
4. Step 4: Simplify right side
   1,940.72x = 2,829,518.67
5. Step 5: Solve for x
   x = 2,829,518.67/1,940.72
6. Step 6: Final answer
   x = 1,457.98