Finding the Fourth Proportional to 139,378.34, 192,500.21 and 93,978.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,378.34 : 192,500.21 = 93,978.05 : x
2. Step 2: Convert to fraction form
   139,378.34/192,500.21 = 93,978.05/x
3. Step 3: Cross multiply
   139,378.34x = 192,500.21 × 93,978.05
4. Step 4: Simplify right side
   139,378.34x = 18,090,793,632.83
5. Step 5: Solve for x
   x = 18,090,793,632.83/139,378.34
6. Step 6: Final answer
   x = 129,796.30