Finding the Fourth Proportional to 7,817.50, 10,788.15 and 4,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,817.50 : 10,788.15 = 4,505.50 : x
2. Step 2: Convert to fraction form
   7,817.50/10,788.15 = 4,505.50/x
3. Step 3: Cross multiply
   7,817.50x = 10,788.15 × 4,505.50
4. Step 4: Simplify right side
   7,817.50x = 48,606,009.83
5. Step 5: Solve for x
   x = 48,606,009.83/7,817.50
6. Step 6: Final answer
   x = 6,217.59