Finding the Fourth Proportional to 42,999.50, 64,482.68 and 16,700.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,999.50 : 64,482.68 = 16,700.78 : x
2. Step 2: Convert to fraction form
   42,999.50/64,482.68 = 16,700.78/x
3. Step 3: Cross multiply
   42,999.50x = 64,482.68 × 16,700.78
4. Step 4: Simplify right side
   42,999.50x = 1,076,911,052.49
5. Step 5: Solve for x
   x = 1,076,911,052.49/42,999.50
6. Step 6: Final answer
   x = 25,044.73