Finding the Fourth Proportional to 139,513.63, 192,535.40 and 79,085.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,513.63 : 192,535.40 = 79,085.45 : x
2. Step 2: Convert to fraction form
   139,513.63/192,535.40 = 79,085.45/x
3. Step 3: Cross multiply
   139,513.63x = 192,535.40 × 79,085.45
4. Step 4: Simplify right side
   139,513.63x = 15,226,749,132.41
5. Step 5: Solve for x
   x = 15,226,749,132.41/139,513.63
6. Step 6: Final answer
   x = 109,141.66