Finding the Fourth Proportional to 91,271.60, 136,920.37 and 28,096.98

Step by Step Solution

1. Step 1: Write the proportion equation
   91,271.60 : 136,920.37 = 28,096.98 : x
2. Step 2: Convert to fraction form
   91,271.60/136,920.37 = 28,096.98/x
3. Step 3: Cross multiply
   91,271.60x = 136,920.37 × 28,096.98
4. Step 4: Simplify right side
   91,271.60x = 3,847,048,897.48
5. Step 5: Solve for x
   x = 3,847,048,897.48/91,271.60
6. Step 6: Final answer
   x = 42,149.46