Finding the Fourth Proportional to 7,870.02, 11,809.59 and 2,939.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.02 : 11,809.59 = 2,939.48 : x
2. Step 2: Convert to fraction form
   7,870.02/11,809.59 = 2,939.48/x
3. Step 3: Cross multiply
   7,870.02x = 11,809.59 × 2,939.48
4. Step 4: Simplify right side
   7,870.02x = 34,714,053.61
5. Step 5: Solve for x
   x = 34,714,053.61/7,870.02
6. Step 6: Final answer
   x = 4,410.92