Finding the Fourth Proportional to 12,948.05, 17,866.98 and 7,913.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,948.05 : 17,866.98 = 7,913.50 : x
2. Step 2: Convert to fraction form
   12,948.05/17,866.98 = 7,913.50/x
3. Step 3: Cross multiply
   12,948.05x = 17,866.98 × 7,913.50
4. Step 4: Simplify right side
   12,948.05x = 141,390,301.56
5. Step 5: Solve for x
   x = 141,390,301.56/12,948.05
6. Step 6: Final answer
   x = 10,919.81