Finding the Fourth Proportional to 10,500.54, 14,488.47 and 7,981.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,500.54 : 14,488.47 = 7,981.98 : x
2. Step 2: Convert to fraction form
   10,500.54/14,488.47 = 7,981.98/x
3. Step 3: Cross multiply
   10,500.54x = 14,488.47 × 7,981.98
4. Step 4: Simplify right side
   10,500.54x = 115,646,677.77
5. Step 5: Solve for x
   x = 115,646,677.77/10,500.54
6. Step 6: Final answer
   x = 11,013.40