Finding the Fourth Proportional to 9,404.82, 12,980.12 and 5,427.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.82 : 12,980.12 = 5,427.18 : x
2. Step 2: Convert to fraction form
   9,404.82/12,980.12 = 5,427.18/x
3. Step 3: Cross multiply
   9,404.82x = 12,980.12 × 5,427.18
4. Step 4: Simplify right side
   9,404.82x = 70,445,420.53
5. Step 5: Solve for x
   x = 70,445,420.53/9,404.82
6. Step 6: Final answer
   x = 7,490.35