Finding the Fourth Proportional to 42,781.40, 64,152.90 and 16,477.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,781.40 : 64,152.90 = 16,477.40 : x
2. Step 2: Convert to fraction form
   42,781.40/64,152.90 = 16,477.40/x
3. Step 3: Cross multiply
   42,781.40x = 64,152.90 × 16,477.40
4. Step 4: Simplify right side
   42,781.40x = 1,057,072,994.46
5. Step 5: Solve for x
   x = 1,057,072,994.46/42,781.40
6. Step 6: Final answer
   x = 24,708.71