Finding the Fourth Proportional to 139,510.82, 209,228.21 and 38,284.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,510.82 : 209,228.21 = 38,284.88 : x
2. Step 2: Convert to fraction form
   139,510.82/209,228.21 = 38,284.88/x
3. Step 3: Cross multiply
   139,510.82x = 209,228.21 × 38,284.88
4. Step 4: Simplify right side
   139,510.82x = 8,010,275,674.90
5. Step 5: Solve for x
   x = 8,010,275,674.90/139,510.82
6. Step 6: Final answer
   x = 57,416.88