Finding the Fourth Proportional to 13,929.99, 19,218.72 and 7,957.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,929.99 : 19,218.72 = 7,957.43 : x
2. Step 2: Convert to fraction form
   13,929.99/19,218.72 = 7,957.43/x
3. Step 3: Cross multiply
   13,929.99x = 19,218.72 × 7,957.43
4. Step 4: Simplify right side
   13,929.99x = 152,931,688.25
5. Step 5: Solve for x
   x = 152,931,688.25/13,929.99
6. Step 6: Final answer
   x = 10,978.59