Finding the Fourth Proportional to 42,990.72, 64,461.23 and 16,664.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,990.72 : 64,461.23 = 16,664.70 : x
2. Step 2: Convert to fraction form
   42,990.72/64,461.23 = 16,664.70/x
3. Step 3: Cross multiply
   42,990.72x = 64,461.23 × 16,664.70
4. Step 4: Simplify right side
   42,990.72x = 1,074,227,280.48
5. Step 5: Solve for x
   x = 1,074,227,280.48/42,990.72
6. Step 6: Final answer
   x = 24,987.42