Finding the Fourth Proportional to 15,870.14, 21,901.48 and 8,796.56

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.14 : 21,901.48 = 8,796.56 : x
2. Step 2: Convert to fraction form
   15,870.14/21,901.48 = 8,796.56/x
3. Step 3: Cross multiply
   15,870.14x = 21,901.48 × 8,796.56
4. Step 4: Simplify right side
   15,870.14x = 192,657,715.67
5. Step 5: Solve for x
   x = 192,657,715.67/15,870.14
6. Step 6: Final answer
   x = 12,139.64