Finding the Fourth Proportional to 139,856.82, 209,526.30 and 108,154.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,856.82 : 209,526.30 = 108,154.50 : x
2. Step 2: Convert to fraction form
   139,856.82/209,526.30 = 108,154.50/x
3. Step 3: Cross multiply
   139,856.82x = 209,526.30 × 108,154.50
4. Step 4: Simplify right side
   139,856.82x = 22,661,212,213.35
5. Step 5: Solve for x
   x = 22,661,212,213.35/139,856.82
6. Step 6: Final answer
   x = 162,031.51