Finding the Fourth Proportional to 5,470.15, 8,211.72 and 5,247.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470.15 : 8,211.72 = 5,247.34 : x
2. Step 2: Convert to fraction form
   5,470.15/8,211.72 = 5,247.34/x
3. Step 3: Cross multiply
   5,470.15x = 8,211.72 × 5,247.34
4. Step 4: Simplify right side
   5,470.15x = 43,089,686.82
5. Step 5: Solve for x
   x = 43,089,686.82/5,470.15
6. Step 6: Final answer
   x = 7,877.24