Finding the Fourth Proportional to 13,807.67, 19,054.80 and 7,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,807.67 : 19,054.80 = 7,839.50 : x
2. Step 2: Convert to fraction form
   13,807.67/19,054.80 = 7,839.50/x
3. Step 3: Cross multiply
   13,807.67x = 19,054.80 × 7,839.50
4. Step 4: Simplify right side
   13,807.67x = 149,380,009.33
5. Step 5: Solve for x
   x = 149,380,009.33/13,807.67
6. Step 6: Final answer
   x = 10,818.63