Finding the Fourth Proportional to 1,947.90, 2,685.31 and 1,201.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.90 : 2,685.31 = 1,201.36 : x
2. Step 2: Convert to fraction form
   1,947.90/2,685.31 = 1,201.36/x
3. Step 3: Cross multiply
   1,947.90x = 2,685.31 × 1,201.36
4. Step 4: Simplify right side
   1,947.90x = 3,226,004.59
5. Step 5: Solve for x
   x = 3,226,004.59/1,947.90
6. Step 6: Final answer
   x = 1,656.14