Finding the Fourth Proportional to 92,085.57, 137,456.08 and 79,021.89

Step by Step Solution

1. Step 1: Write the proportion equation
   92,085.57 : 137,456.08 = 79,021.89 : x
2. Step 2: Convert to fraction form
   92,085.57/137,456.08 = 79,021.89/x
3. Step 3: Cross multiply
   92,085.57x = 137,456.08 × 79,021.89
4. Step 4: Simplify right side
   92,085.57x = 10,862,039,036.04
5. Step 5: Solve for x
   x = 10,862,039,036.04/92,085.57
6. Step 6: Final answer
   x = 117,955.93