Finding the Fourth Proportional to 2,490.70, 3,736.86 and 848.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.70 : 3,736.86 = 848.30 : x
2. Step 2: Convert to fraction form
   2,490.70/3,736.86 = 848.30/x
3. Step 3: Cross multiply
   2,490.70x = 3,736.86 × 848.30
4. Step 4: Simplify right side
   2,490.70x = 3,169,978.34
5. Step 5: Solve for x
   x = 3,169,978.34/2,490.70
6. Step 6: Final answer
   x = 1,272.73