Finding the Fourth Proportional to 13,978.85, 19,280.72 and 8,008.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.85 : 19,280.72 = 8,008.34 : x
2. Step 2: Convert to fraction form
   13,978.85/19,280.72 = 8,008.34/x
3. Step 3: Cross multiply
   13,978.85x = 19,280.72 × 8,008.34
4. Step 4: Simplify right side
   13,978.85x = 154,406,424.76
5. Step 5: Solve for x
   x = 154,406,424.76/13,978.85
6. Step 6: Final answer
   x = 11,045.72