Finding the Fourth Proportional to 139,909.46, 193,074.72 and 76,247.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,909.46 : 193,074.72 = 76,247.09 : x
2. Step 2: Convert to fraction form
   139,909.46/193,074.72 = 76,247.09/x
3. Step 3: Cross multiply
   139,909.46x = 193,074.72 × 76,247.09
4. Step 4: Simplify right side
   139,909.46x = 14,721,385,552.56
5. Step 5: Solve for x
   x = 14,721,385,552.56/139,909.46
6. Step 6: Final answer
   x = 105,220.80