Finding the Fourth Proportional to 137,469.56, 206,212.10 and 42,713.20

Step by Step Solution

1. Step 1: Write the proportion equation
   137,469.56 : 206,212.10 = 42,713.20 : x
2. Step 2: Convert to fraction form
   137,469.56/206,212.10 = 42,713.20/x
3. Step 3: Cross multiply
   137,469.56x = 206,212.10 × 42,713.20
4. Step 4: Simplify right side
   137,469.56x = 8,807,978,669.72
5. Step 5: Solve for x
   x = 8,807,978,669.72/137,469.56
6. Step 6: Final answer
   x = 64,072.21