Finding the Fourth Proportional to 1,838.42, 2,755.30 and 1,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,838.42 : 2,755.30 = 1,212.50 : x
2. Step 2: Convert to fraction form
   1,838.42/2,755.30 = 1,212.50/x
3. Step 3: Cross multiply
   1,838.42x = 2,755.30 × 1,212.50
4. Step 4: Simplify right side
   1,838.42x = 3,340,801.25
5. Step 5: Solve for x
   x = 3,340,801.25/1,838.42
6. Step 6: Final answer
   x = 1,817.21