Finding the Fourth Proportional to 35,500.71, 48,988.46 and 19,980.60

Step by Step Solution

1. Step 1: Write the proportion equation
   35,500.71 : 48,988.46 = 19,980.60 : x
2. Step 2: Convert to fraction form
   35,500.71/48,988.46 = 19,980.60/x
3. Step 3: Cross multiply
   35,500.71x = 48,988.46 × 19,980.60
4. Step 4: Simplify right side
   35,500.71x = 978,818,773.92
5. Step 5: Solve for x
   x = 978,818,773.92/35,500.71
6. Step 6: Final answer
   x = 27,571.81