Finding the Fourth Proportional to 85,698.27, 128,553.41 and 26,526.15

Step by Step Solution

1. Step 1: Write the proportion equation
   85,698.27 : 128,553.41 = 26,526.15 : x
2. Step 2: Convert to fraction form
   85,698.27/128,553.41 = 26,526.15/x
3. Step 3: Cross multiply
   85,698.27x = 128,553.41 × 26,526.15
4. Step 4: Simplify right side
   85,698.27x = 3,410,026,904.04
5. Step 5: Solve for x
   x = 3,410,026,904.04/85,698.27
6. Step 6: Final answer
   x = 39,791.08