Finding the Fourth Proportional to 22,486.86, 31,030.25 and 12,415.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,486.86 : 31,030.25 = 12,415.32 : x
2. Step 2: Convert to fraction form
   22,486.86/31,030.25 = 12,415.32/x
3. Step 3: Cross multiply
   22,486.86x = 31,030.25 × 12,415.32
4. Step 4: Simplify right side
   22,486.86x = 385,250,421.35
5. Step 5: Solve for x
   x = 385,250,421.35/22,486.86
6. Step 6: Final answer
   x = 17,132.25