Finding the Fourth Proportional to 13,636.78, 18,818.98 and 7,587.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,636.78 : 18,818.98 = 7,587.50 : x
2. Step 2: Convert to fraction form
   13,636.78/18,818.98 = 7,587.50/x
3. Step 3: Cross multiply
   13,636.78x = 18,818.98 × 7,587.50
4. Step 4: Simplify right side
   13,636.78x = 142,789,010.75
5. Step 5: Solve for x
   x = 142,789,010.75/13,636.78
6. Step 6: Final answer
   x = 10,470.87