Finding the Fourth Proportional to 28,261.50, 42,399.03 and 8,538.84

Step by Step Solution

1. Step 1: Write the proportion equation
   28,261.50 : 42,399.03 = 8,538.84 : x
2. Step 2: Convert to fraction form
   28,261.50/42,399.03 = 8,538.84/x
3. Step 3: Cross multiply
   28,261.50x = 42,399.03 × 8,538.84
4. Step 4: Simplify right side
   28,261.50x = 362,038,533.33
5. Step 5: Solve for x
   x = 362,038,533.33/28,261.50
6. Step 6: Final answer
   x = 12,810.31