Finding the Fourth Proportional to 8,978.01, 13,461.51 and 3,425.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.01 : 13,461.51 = 3,425.40 : x
2. Step 2: Convert to fraction form
   8,978.01/13,461.51 = 3,425.40/x
3. Step 3: Cross multiply
   8,978.01x = 13,461.51 × 3,425.40
4. Step 4: Simplify right side
   8,978.01x = 46,111,056.35
5. Step 5: Solve for x
   x = 46,111,056.35/8,978.01
6. Step 6: Final answer
   x = 5,136.00