Finding the Fourth Proportional to 91,271.69, 136,920.51 and 28,097.08

Step by Step Solution

1. Step 1: Write the proportion equation
   91,271.69 : 136,920.51 = 28,097.08 : x
2. Step 2: Convert to fraction form
   91,271.69/136,920.51 = 28,097.08/x
3. Step 3: Cross multiply
   91,271.69x = 136,920.51 × 28,097.08
4. Step 4: Simplify right side
   91,271.69x = 3,847,066,523.11
5. Step 5: Solve for x
   x = 3,847,066,523.11/91,271.69
6. Step 6: Final answer
   x = 42,149.61