Finding the Fourth Proportional to 1,406.86, 1,940.36 and 1,312.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.86 : 1,940.36 = 1,312.54 : x
2. Step 2: Convert to fraction form
   1,406.86/1,940.36 = 1,312.54/x
3. Step 3: Cross multiply
   1,406.86x = 1,940.36 × 1,312.54
4. Step 4: Simplify right side
   1,406.86x = 2,546,795.98
5. Step 5: Solve for x
   x = 2,546,795.98/1,406.86
6. Step 6: Final answer
   x = 1,810.27