Finding the Fourth Proportional to 138,069.35, 207,104.52 and 42,007.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,069.35 : 207,104.52 = 42,007.50 : x
2. Step 2: Convert to fraction form
   138,069.35/207,104.52 = 42,007.50/x
3. Step 3: Cross multiply
   138,069.35x = 207,104.52 × 42,007.50
4. Step 4: Simplify right side
   138,069.35x = 8,699,943,123.90
5. Step 5: Solve for x
   x = 8,699,943,123.90/138,069.35
6. Step 6: Final answer
   x = 63,011.40