Finding the Fourth Proportional to 9,181.87, 12,670.76 and 5,354.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,181.87 : 12,670.76 = 5,354.21 : x
2. Step 2: Convert to fraction form
   9,181.87/12,670.76 = 5,354.21/x
3. Step 3: Cross multiply
   9,181.87x = 12,670.76 × 5,354.21
4. Step 4: Simplify right side
   9,181.87x = 67,841,909.90
5. Step 5: Solve for x
   x = 67,841,909.90/9,181.87
6. Step 6: Final answer
   x = 7,388.69