Finding the Fourth Proportional to 13,900.17, 19,179.54 and 7,931.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,900.17 : 19,179.54 = 7,931.69 : x
2. Step 2: Convert to fraction form
   13,900.17/19,179.54 = 7,931.69/x
3. Step 3: Cross multiply
   13,900.17x = 19,179.54 × 7,931.69
4. Step 4: Simplify right side
   13,900.17x = 152,126,165.62
5. Step 5: Solve for x
   x = 152,126,165.62/13,900.17
6. Step 6: Final answer
   x = 10,944.19