Finding the Fourth Proportional to 139,941.41, 193,105.22 and 78,681.11

Step by Step Solution

1. Step 1: Write the proportion equation
   139,941.41 : 193,105.22 = 78,681.11 : x
2. Step 2: Convert to fraction form
   139,941.41/193,105.22 = 78,681.11/x
3. Step 3: Cross multiply
   139,941.41x = 193,105.22 × 78,681.11
4. Step 4: Simplify right side
   139,941.41x = 15,193,731,697.46
5. Step 5: Solve for x
   x = 15,193,731,697.46/139,941.41
6. Step 6: Final answer
   x = 108,572.10