Finding the Fourth Proportional to 91,100.76, 136,672.88 and 28,771.26

Step by Step Solution

1. Step 1: Write the proportion equation
   91,100.76 : 136,672.88 = 28,771.26 : x
2. Step 2: Convert to fraction form
   91,100.76/136,672.88 = 28,771.26/x
3. Step 3: Cross multiply
   91,100.76x = 136,672.88 × 28,771.26
4. Step 4: Simplify right side
   91,100.76x = 3,932,250,821.57
5. Step 5: Solve for x
   x = 3,932,250,821.57/91,100.76
6. Step 6: Final answer
   x = 43,163.75