Finding the Fourth Proportional to 13,994.18, 19,311.80 and 7,945.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,994.18 : 19,311.80 = 7,945.56 : x
2. Step 2: Convert to fraction form
   13,994.18/19,311.80 = 7,945.56/x
3. Step 3: Cross multiply
   13,994.18x = 19,311.80 × 7,945.56
4. Step 4: Simplify right side
   13,994.18x = 153,443,065.61
5. Step 5: Solve for x
   x = 153,443,065.61/13,994.18
6. Step 6: Final answer
   x = 10,964.78