Finding the Fourth Proportional to 7,870.08, 11,705.91 and 7,168.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,870.08 : 11,705.91 = 7,168.80 : x
2. Step 2: Convert to fraction form
   7,870.08/11,705.91 = 7,168.80/x
3. Step 3: Cross multiply
   7,870.08x = 11,705.91 × 7,168.80
4. Step 4: Simplify right side
   7,870.08x = 83,917,327.61
5. Step 5: Solve for x
   x = 83,917,327.61/7,870.08
6. Step 6: Final answer
   x = 10,662.83