Finding the Fourth Proportional to 137,405.31, 206,137.34 and 42,633.42

Step by Step Solution

1. Step 1: Write the proportion equation
   137,405.31 : 206,137.34 = 42,633.42 : x
2. Step 2: Convert to fraction form
   137,405.31/206,137.34 = 42,633.42/x
3. Step 3: Cross multiply
   137,405.31x = 206,137.34 × 42,633.42
4. Step 4: Simplify right side
   137,405.31x = 8,788,339,580.74
5. Step 5: Solve for x
   x = 8,788,339,580.74/137,405.31
6. Step 6: Final answer
   x = 63,959.24