Finding the Fourth Proportional to 85,361.31, 128,037.15 and 26,196.84

Step by Step Solution

1. Step 1: Write the proportion equation
   85,361.31 : 128,037.15 = 26,196.84 : x
2. Step 2: Convert to fraction form
   85,361.31/128,037.15 = 26,196.84/x
3. Step 3: Cross multiply
   85,361.31x = 128,037.15 × 26,196.84
4. Step 4: Simplify right side
   85,361.31x = 3,354,168,732.61
5. Step 5: Solve for x
   x = 3,354,168,732.61/85,361.31
6. Step 6: Final answer
   x = 39,293.78