Finding the Fourth Proportional to 28,186.58, 42,301.30 and 10,434.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,186.58 : 42,301.30 = 10,434.04 : x
2. Step 2: Convert to fraction form
   28,186.58/42,301.30 = 10,434.04/x
3. Step 3: Cross multiply
   28,186.58x = 42,301.30 × 10,434.04
4. Step 4: Simplify right side
   28,186.58x = 441,373,456.25
5. Step 5: Solve for x
   x = 441,373,456.25/28,186.58
6. Step 6: Final answer
   x = 15,658.99