Finding the Fourth Proportional to 13,807.85, 19,055.31 and 7,839.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,807.85 : 19,055.31 = 7,839.32 : x
2. Step 2: Convert to fraction form
   13,807.85/19,055.31 = 7,839.32/x
3. Step 3: Cross multiply
   13,807.85x = 19,055.31 × 7,839.32
4. Step 4: Simplify right side
   13,807.85x = 149,380,672.79
5. Step 5: Solve for x
   x = 149,380,672.79/13,807.85
6. Step 6: Final answer
   x = 10,818.53