Finding the Fourth Proportional to 13,900.63, 19,181.03 and 7,931.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,900.63 : 19,181.03 = 7,931.95 : x
2. Step 2: Convert to fraction form
   13,900.63/19,181.03 = 7,931.95/x
3. Step 3: Cross multiply
   13,900.63x = 19,181.03 × 7,931.95
4. Step 4: Simplify right side
   13,900.63x = 152,142,970.91
5. Step 5: Solve for x
   x = 152,142,970.91/13,900.63
6. Step 6: Final answer
   x = 10,945.04