Finding the Fourth Proportional to 13,752.82, 18,978.96 and 7,784.38

Step by Step Solution

1. Step 1: Write the proportion equation
   13,752.82 : 18,978.96 = 7,784.38 : x
2. Step 2: Convert to fraction form
   13,752.82/18,978.96 = 7,784.38/x
3. Step 3: Cross multiply
   13,752.82x = 18,978.96 × 7,784.38
4. Step 4: Simplify right side
   13,752.82x = 147,739,436.64
5. Step 5: Solve for x
   x = 147,739,436.64/13,752.82
6. Step 6: Final answer
   x = 10,742.48