Finding the Fourth Proportional to 1,970.52, 2,719.85 and 1,224.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.52 : 2,719.85 = 1,224.06 : x
2. Step 2: Convert to fraction form
   1,970.52/2,719.85 = 1,224.06/x
3. Step 3: Cross multiply
   1,970.52x = 2,719.85 × 1,224.06
4. Step 4: Simplify right side
   1,970.52x = 3,329,259.59
5. Step 5: Solve for x
   x = 3,329,259.59/1,970.52
6. Step 6: Final answer
   x = 1,689.53