Finding the Fourth Proportional to 31,186.72, 46,783.98 and 12,208.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,186.72 : 46,783.98 = 12,208.91 : x
2. Step 2: Convert to fraction form
   31,186.72/46,783.98 = 12,208.91/x
3. Step 3: Cross multiply
   31,186.72x = 46,783.98 × 12,208.91
4. Step 4: Simplify right side
   31,186.72x = 571,181,341.47
5. Step 5: Solve for x
   x = 571,181,341.47/31,186.72
6. Step 6: Final answer
   x = 18,314.89