Finding the Fourth Proportional to 42,661, 63,990.78 and 35,196.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,661 : 63,990.78 = 35,196.04 : x
2. Step 2: Convert to fraction form
   42,661/63,990.78 = 35,196.04/x
3. Step 3: Cross multiply
   42,661x = 63,990.78 × 35,196.04
4. Step 4: Simplify right side
   42,661x = 2,252,222,052.51
5. Step 5: Solve for x
   x = 2,252,222,052.51/42,661
6. Step 6: Final answer
   x = 52,793.47