Finding the Fourth Proportional to 125,809.82, 173,621.71 and 72,105.13

Step by Step Solution

1. Step 1: Write the proportion equation
   125,809.82 : 173,621.71 = 72,105.13 : x
2. Step 2: Convert to fraction form
   125,809.82/173,621.71 = 72,105.13/x
3. Step 3: Cross multiply
   125,809.82x = 173,621.71 × 72,105.13
4. Step 4: Simplify right side
   125,809.82x = 12,519,015,970.37
5. Step 5: Solve for x
   x = 12,519,015,970.37/125,809.82
6. Step 6: Final answer
   x = 99,507.46