Finding the Fourth Proportional to 139,845.67, 192,988.35 and 79,417.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,845.67 : 192,988.35 = 79,417.57 : x
2. Step 2: Convert to fraction form
   139,845.67/192,988.35 = 79,417.57/x
3. Step 3: Cross multiply
   139,845.67x = 192,988.35 × 79,417.57
4. Step 4: Simplify right side
   139,845.67x = 15,326,665,795.31
5. Step 5: Solve for x
   x = 15,326,665,795.31/139,845.67
6. Step 6: Final answer
   x = 109,597.00