Finding the Fourth Proportional to 13,719.30, 18,933.60 and 7,748.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,719.30 : 18,933.60 = 7,748.79 : x
2. Step 2: Convert to fraction form
   13,719.30/18,933.60 = 7,748.79/x
3. Step 3: Cross multiply
   13,719.30x = 18,933.60 × 7,748.79
4. Step 4: Simplify right side
   13,719.30x = 146,712,490.34
5. Step 5: Solve for x
   x = 146,712,490.34/13,719.30
6. Step 6: Final answer
   x = 10,693.88