Finding the Fourth Proportional to 8,779.50, 12,112.30 and 5,416.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,779.50 : 12,112.30 = 5,416.48 : x
2. Step 2: Convert to fraction form
   8,779.50/12,112.30 = 5,416.48/x
3. Step 3: Cross multiply
   8,779.50x = 12,112.30 × 5,416.48
4. Step 4: Simplify right side
   8,779.50x = 65,606,030.70
5. Step 5: Solve for x
   x = 65,606,030.70/8,779.50
6. Step 6: Final answer
   x = 7,472.64