Finding the Fourth Proportional to 28,322.31, 42,480.72 and 8,601.03

Step by Step Solution

1. Step 1: Write the proportion equation
   28,322.31 : 42,480.72 = 8,601.03 : x
2. Step 2: Convert to fraction form
   28,322.31/42,480.72 = 8,601.03/x
3. Step 3: Cross multiply
   28,322.31x = 42,480.72 × 8,601.03
4. Step 4: Simplify right side
   28,322.31x = 365,377,947.14
5. Step 5: Solve for x
   x = 365,377,947.14/28,322.31
6. Step 6: Final answer
   x = 12,900.71