Finding the Fourth Proportional to 13,499.42, 18,627.86 and 7,834.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.42 : 18,627.86 = 7,834.55 : x
2. Step 2: Convert to fraction form
   13,499.42/18,627.86 = 7,834.55/x
3. Step 3: Cross multiply
   13,499.42x = 18,627.86 × 7,834.55
4. Step 4: Simplify right side
   13,499.42x = 145,940,768.25
5. Step 5: Solve for x
   x = 145,940,768.25/13,499.42
6. Step 6: Final answer
   x = 10,810.90