Finding the Fourth Proportional to 103,936.17, 155,834.21 and 83,970.23

Step by Step Solution

1. Step 1: Write the proportion equation
   103,936.17 : 155,834.21 = 83,970.23 : x
2. Step 2: Convert to fraction form
   103,936.17/155,834.21 = 83,970.23/x
3. Step 3: Cross multiply
   103,936.17x = 155,834.21 × 83,970.23
4. Step 4: Simplify right side
   103,936.17x = 13,085,433,256.55
5. Step 5: Solve for x
   x = 13,085,433,256.55/103,936.17
6. Step 6: Final answer
   x = 125,898.74