Finding the Fourth Proportional to 13,700.53, 18,906.78 and 7,412.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,700.53 : 18,906.78 = 7,412.91 : x
2. Step 2: Convert to fraction form
   13,700.53/18,906.78 = 7,412.91/x
3. Step 3: Cross multiply
   13,700.53x = 18,906.78 × 7,412.91
4. Step 4: Simplify right side
   13,700.53x = 140,154,164.00
5. Step 5: Solve for x
   x = 140,154,164.00/13,700.53
6. Step 6: Final answer
   x = 10,229.84