Finding the Fourth Proportional to 78,485.09, 117,725.03 and 34,111.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.09 : 117,725.03 = 34,111.90 : x
2. Step 2: Convert to fraction form
   78,485.09/117,725.03 = 34,111.90/x
3. Step 3: Cross multiply
   78,485.09x = 117,725.03 × 34,111.90
4. Step 4: Simplify right side
   78,485.09x = 4,015,823,691.67
5. Step 5: Solve for x
   x = 4,015,823,691.67/78,485.09
6. Step 6: Final answer
   x = 51,166.71