Finding the Fourth Proportional to 139,438.76, 192,426.71 and 75,776.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,438.76 : 192,426.71 = 75,776.55 : x
2. Step 2: Convert to fraction form
   139,438.76/192,426.71 = 75,776.55/x
3. Step 3: Cross multiply
   139,438.76x = 192,426.71 × 75,776.55
4. Step 4: Simplify right side
   139,438.76x = 14,581,431,832.77
5. Step 5: Solve for x
   x = 14,581,431,832.77/139,438.76
6. Step 6: Final answer
   x = 104,572.30