Finding the Fourth Proportional to 83,968.43, 115,878.51 and 51,691.05

Step by Step Solution

1. Step 1: Write the proportion equation
   83,968.43 : 115,878.51 = 51,691.05 : x
2. Step 2: Convert to fraction form
   83,968.43/115,878.51 = 51,691.05/x
3. Step 3: Cross multiply
   83,968.43x = 115,878.51 × 51,691.05
4. Step 4: Simplify right side
   83,968.43x = 5,989,881,854.34
5. Step 5: Solve for x
   x = 5,989,881,854.34/83,968.43
6. Step 6: Final answer
   x = 71,334.93