Finding the Fourth Proportional to 13,876.59, 19,151.37 and 7,909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,876.59 : 19,151.37 = 7,909.50 : x
2. Step 2: Convert to fraction form
   13,876.59/19,151.37 = 7,909.50/x
3. Step 3: Cross multiply
   13,876.59x = 19,151.37 × 7,909.50
4. Step 4: Simplify right side
   13,876.59x = 151,477,761.02
5. Step 5: Solve for x
   x = 151,477,761.02/13,876.59
6. Step 6: Final answer
   x = 10,916.07