Finding the Fourth Proportional to 7,978.74, 11,968.71 and 2,432.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.74 : 11,968.71 = 2,432.55 : x
2. Step 2: Convert to fraction form
   7,978.74/11,968.71 = 2,432.55/x
3. Step 3: Cross multiply
   7,978.74x = 11,968.71 × 2,432.55
4. Step 4: Simplify right side
   7,978.74x = 29,114,485.51
5. Step 5: Solve for x
   x = 29,114,485.51/7,978.74
6. Step 6: Final answer
   x = 3,649.01