Finding the Fourth Proportional to 13,880.59, 19,156.89 and 7,913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,880.59 : 19,156.89 = 7,913.50 : x
2. Step 2: Convert to fraction form
   13,880.59/19,156.89 = 7,913.50/x
3. Step 3: Cross multiply
   13,880.59x = 19,156.89 × 7,913.50
4. Step 4: Simplify right side
   13,880.59x = 151,598,049.02
5. Step 5: Solve for x
   x = 151,598,049.02/13,880.59
6. Step 6: Final answer
   x = 10,921.59