Finding the Fourth Proportional to 124,417.50, 171,696.15 and 79,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   124,417.50 : 171,696.15 = 79,705.50 : x
2. Step 2: Convert to fraction form
   124,417.50/171,696.15 = 79,705.50/x
3. Step 3: Cross multiply
   124,417.50x = 171,696.15 × 79,705.50
4. Step 4: Simplify right side
   124,417.50x = 13,685,127,483.83
5. Step 5: Solve for x
   x = 13,685,127,483.83/124,417.50
6. Step 6: Final answer
   x = 109,993.59