Finding the Fourth Proportional to 35,978.58, 53,975.16 and 12,606.84

Step by Step Solution

1. Step 1: Write the proportion equation
   35,978.58 : 53,975.16 = 12,606.84 : x
2. Step 2: Convert to fraction form
   35,978.58/53,975.16 = 12,606.84/x
3. Step 3: Cross multiply
   35,978.58x = 53,975.16 × 12,606.84
4. Step 4: Simplify right side
   35,978.58x = 680,456,206.09
5. Step 5: Solve for x
   x = 680,456,206.09/35,978.58
6. Step 6: Final answer
   x = 18,912.81