Finding the Fourth Proportional to 91,268.10, 136,902.42 and 28,087.83

Step by Step Solution

1. Step 1: Write the proportion equation
   91,268.10 : 136,902.42 = 28,087.83 : x
2. Step 2: Convert to fraction form
   91,268.10/136,902.42 = 28,087.83/x
3. Step 3: Cross multiply
   91,268.10x = 136,902.42 × 28,087.83
4. Step 4: Simplify right side
   91,268.10x = 3,845,291,899.55
5. Step 5: Solve for x
   x = 3,845,291,899.55/91,268.10
6. Step 6: Final answer
   x = 42,131.83