Finding the Fourth Proportional to 28,111.16, 42,150.79 and 9,381.02

Step by Step Solution

1. Step 1: Write the proportion equation
   28,111.16 : 42,150.79 = 9,381.02 : x
2. Step 2: Convert to fraction form
   28,111.16/42,150.79 = 9,381.02/x
3. Step 3: Cross multiply
   28,111.16x = 42,150.79 × 9,381.02
4. Step 4: Simplify right side
   28,111.16x = 395,417,509.38
5. Step 5: Solve for x
   x = 395,417,509.38/28,111.16
6. Step 6: Final answer
   x = 14,066.21