Finding the Fourth Proportional to 85,837.60, 128,768.55 and 26,667.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,837.60 : 128,768.55 = 26,667.10 : x
2. Step 2: Convert to fraction form
   85,837.60/128,768.55 = 26,667.10/x
3. Step 3: Cross multiply
   85,837.60x = 128,768.55 × 26,667.10
4. Step 4: Simplify right side
   85,837.60x = 3,433,883,799.71
5. Step 5: Solve for x
   x = 3,433,883,799.71/85,837.60
6. Step 6: Final answer
   x = 40,004.42