Finding the Fourth Proportional to 42,996.86, 64,470.38 and 16,670.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,996.86 : 64,470.38 = 16,670.78 : x
2. Step 2: Convert to fraction form
   42,996.86/64,470.38 = 16,670.78/x
3. Step 3: Cross multiply
   42,996.86x = 64,470.38 × 16,670.78
4. Step 4: Simplify right side
   42,996.86x = 1,074,771,521.50
5. Step 5: Solve for x
   x = 1,074,771,521.50/42,996.86
6. Step 6: Final answer
   x = 24,996.51