Finding the Fourth Proportional to 83,869.49, 115,645.42 and 61,168.43

Step by Step Solution

1. Step 1: Write the proportion equation
   83,869.49 : 115,645.42 = 61,168.43 : x
2. Step 2: Convert to fraction form
   83,869.49/115,645.42 = 61,168.43/x
3. Step 3: Cross multiply
   83,869.49x = 115,645.42 × 61,168.43
4. Step 4: Simplify right side
   83,869.49x = 7,073,849,143.66
5. Step 5: Solve for x
   x = 7,073,849,143.66/83,869.49
6. Step 6: Final answer
   x = 84,343.53