Finding the Fourth Proportional to 8,420.31, 11,624.94 and 5,591.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,420.31 : 11,624.94 = 5,591.52 : x
2. Step 2: Convert to fraction form
   8,420.31/11,624.94 = 5,591.52/x
3. Step 3: Cross multiply
   8,420.31x = 11,624.94 × 5,591.52
4. Step 4: Simplify right side
   8,420.31x = 65,001,084.51
5. Step 5: Solve for x
   x = 65,001,084.51/8,420.31
6. Step 6: Final answer
   x = 7,719.56