Finding the Fourth Proportional to 91,288.35, 136,937.47 and 28,151.94

Step by Step Solution

1. Step 1: Write the proportion equation
   91,288.35 : 136,937.47 = 28,151.94 : x
2. Step 2: Convert to fraction form
   91,288.35/136,937.47 = 28,151.94/x
3. Step 3: Cross multiply
   91,288.35x = 136,937.47 × 28,151.94
4. Step 4: Simplify right side
   91,288.35x = 3,855,055,439.19
5. Step 5: Solve for x
   x = 3,855,055,439.19/91,288.35
6. Step 6: Final answer
   x = 42,229.43