Finding the Fourth Proportional to 5,470.65, 8,212.47 and 5,247.84

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470.65 : 8,212.47 = 5,247.84 : x
2. Step 2: Convert to fraction form
   5,470.65/8,212.47 = 5,247.84/x
3. Step 3: Cross multiply
   5,470.65x = 8,212.47 × 5,247.84
4. Step 4: Simplify right side
   5,470.65x = 43,097,728.56
5. Step 5: Solve for x
   x = 43,097,728.56/5,470.65
6. Step 6: Final answer
   x = 7,877.99