Finding the Fourth Proportional to 9,017.86, 12,430.65 and 8,842.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,017.86 : 12,430.65 = 8,842.90 : x
2. Step 2: Convert to fraction form
   9,017.86/12,430.65 = 8,842.90/x
3. Step 3: Cross multiply
   9,017.86x = 12,430.65 × 8,842.90
4. Step 4: Simplify right side
   9,017.86x = 109,922,994.89
5. Step 5: Solve for x
   x = 109,922,994.89/9,017.86
6. Step 6: Final answer
   x = 12,189.48