Finding the Fourth Proportional to 8,978.84, 13,474.42 and 3,135.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.84 : 13,474.42 = 3,135.45 : x
2. Step 2: Convert to fraction form
   8,978.84/13,474.42 = 3,135.45/x
3. Step 3: Cross multiply
   8,978.84x = 13,474.42 × 3,135.45
4. Step 4: Simplify right side
   8,978.84x = 42,248,362.35
5. Step 5: Solve for x
   x = 42,248,362.35/8,978.84
6. Step 6: Final answer
   x = 4,705.33