Finding the Fourth Proportional to 89,640.19, 123,538.67 and 83,952.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89,640.19 : 123,538.67 = 83,952.10 : x
2. Step 2: Convert to fraction form
   89,640.19/123,538.67 = 83,952.10/x
3. Step 3: Cross multiply
   89,640.19x = 123,538.67 × 83,952.10
4. Step 4: Simplify right side
   89,640.19x = 10,371,330,160.01
5. Step 5: Solve for x
   x = 10,371,330,160.01/89,640.19
6. Step 6: Final answer
   x = 115,699.56