Finding the Fourth Proportional to 13,808.50, 19,056.76 and 7,840.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,808.50 : 19,056.76 = 7,840.42 : x
2. Step 2: Convert to fraction form
   13,808.50/19,056.76 = 7,840.42/x
3. Step 3: Cross multiply
   13,808.50x = 19,056.76 × 7,840.42
4. Step 4: Simplify right side
   13,808.50x = 149,413,002.24
5. Step 5: Solve for x
   x = 149,413,002.24/13,808.50
6. Step 6: Final answer
   x = 10,820.36