Finding the Fourth Proportional to 2,602.48, 3,901.56 and 1,215.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602.48 : 3,901.56 = 1,215.08 : x
2. Step 2: Convert to fraction form
   2,602.48/3,901.56 = 1,215.08/x
3. Step 3: Cross multiply
   2,602.48x = 3,901.56 × 1,215.08
4. Step 4: Simplify right side
   2,602.48x = 4,740,707.52
5. Step 5: Solve for x
   x = 4,740,707.52/2,602.48
6. Step 6: Final answer
   x = 1,821.61