Finding the Fourth Proportional to 1,839.69, 2,538.48 and 1,210.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,839.69 : 2,538.48 = 1,210.48 : x
2. Step 2: Convert to fraction form
   1,839.69/2,538.48 = 1,210.48/x
3. Step 3: Cross multiply
   1,839.69x = 2,538.48 × 1,210.48
4. Step 4: Simplify right side
   1,839.69x = 3,072,777.46
5. Step 5: Solve for x
   x = 3,072,777.46/1,839.69
6. Step 6: Final answer
   x = 1,670.27