Finding the Fourth Proportional to 13,503.53, 18,637.61 and 7,839.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,503.53 : 18,637.61 = 7,839.52 : x
2. Step 2: Convert to fraction form
   13,503.53/18,637.61 = 7,839.52/x
3. Step 3: Cross multiply
   13,503.53x = 18,637.61 × 7,839.52
4. Step 4: Simplify right side
   13,503.53x = 146,109,830.56
5. Step 5: Solve for x
   x = 146,109,830.56/13,503.53
6. Step 6: Final answer
   x = 10,820.12