Finding the Fourth Proportional to 32,688.32, 49,026.60 and 13,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   32,688.32 : 49,026.60 = 13,978.88 : x
2. Step 2: Convert to fraction form
   32,688.32/49,026.60 = 13,978.88/x
3. Step 3: Cross multiply
   32,688.32x = 49,026.60 × 13,978.88
4. Step 4: Simplify right side
   32,688.32x = 685,336,958.21
5. Step 5: Solve for x
   x = 685,336,958.21/32,688.32
6. Step 6: Final answer
   x = 20,965.81