Finding the Fourth Proportional to 1,898.50, 2,619.93 and 1,200.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.50 : 2,619.93 = 1,200.46 : x
2. Step 2: Convert to fraction form
   1,898.50/2,619.93 = 1,200.46/x
3. Step 3: Cross multiply
   1,898.50x = 2,619.93 × 1,200.46
4. Step 4: Simplify right side
   1,898.50x = 3,145,121.17
5. Step 5: Solve for x
   x = 3,145,121.17/1,898.50
6. Step 6: Final answer
   x = 1,656.63