Finding the Fourth Proportional to 13,900.47, 19,182.40 and 7,931.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,900.47 : 19,182.40 = 7,931.98 : x
2. Step 2: Convert to fraction form
   13,900.47/19,182.40 = 7,931.98/x
3. Step 3: Cross multiply
   13,900.47x = 19,182.40 × 7,931.98
4. Step 4: Simplify right side
   13,900.47x = 152,154,413.15
5. Step 5: Solve for x
   x = 152,154,413.15/13,900.47
6. Step 6: Final answer
   x = 10,945.99