Finding the Fourth Proportional to 91,238.22, 136,872 and 38,648.16

Step by Step Solution

1. Step 1: Write the proportion equation
   91,238.22 : 136,872 = 38,648.16 : x
2. Step 2: Convert to fraction form
   91,238.22/136,872 = 38,648.16/x
3. Step 3: Cross multiply
   91,238.22x = 136,872 × 38,648.16
4. Step 4: Simplify right side
   91,238.22x = 5,289,850,955.52
5. Step 5: Solve for x
   x = 5,289,850,955.52/91,238.22
6. Step 6: Final answer
   x = 57,978.45