Finding the Fourth Proportional to 6,870.17, 10,306.64 and 2,921.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,870.17 : 10,306.64 = 2,921.42 : x
2. Step 2: Convert to fraction form
   6,870.17/10,306.64 = 2,921.42/x
3. Step 3: Cross multiply
   6,870.17x = 10,306.64 × 2,921.42
4. Step 4: Simplify right side
   6,870.17x = 30,109,999.32
5. Step 5: Solve for x
   x = 30,109,999.32/6,870.17
6. Step 6: Final answer
   x = 4,382.72