Finding the Fourth Proportional to 13,752.36, 18,978.71 and 7,783.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,752.36 : 18,978.71 = 7,783.89 : x
2. Step 2: Convert to fraction form
   13,752.36/18,978.71 = 7,783.89/x
3. Step 3: Cross multiply
   13,752.36x = 18,978.71 × 7,783.89
4. Step 4: Simplify right side
   13,752.36x = 147,728,152.06
5. Step 5: Solve for x
   x = 147,728,152.06/13,752.36
6. Step 6: Final answer
   x = 10,742.02