Finding the Fourth Proportional to 139,868.88, 209,803.50 and 106,776.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.88 : 209,803.50 = 106,776.81 : x
2. Step 2: Convert to fraction form
   139,868.88/209,803.50 = 106,776.81/x
3. Step 3: Cross multiply
   139,868.88x = 209,803.50 × 106,776.81
4. Step 4: Simplify right side
   139,868.88x = 22,402,148,456.84
5. Step 5: Solve for x
   x = 22,402,148,456.84/139,868.88
6. Step 6: Final answer
   x = 160,165.35