Finding the Fourth Proportional to 139,875.38, 193,025.42 and 77,789.67

Step by Step Solution

1. Step 1: Write the proportion equation
   139,875.38 : 193,025.42 = 77,789.67 : x
2. Step 2: Convert to fraction form
   139,875.38/193,025.42 = 77,789.67/x
3. Step 3: Cross multiply
   139,875.38x = 193,025.42 × 77,789.67
4. Step 4: Simplify right side
   139,875.38x = 15,015,384,014.43
5. Step 5: Solve for x
   x = 15,015,384,014.43/139,875.38
6. Step 6: Final answer
   x = 107,348.30