Finding the Fourth Proportional to 91,333.23, 137,012.76 and 28,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,333.23 : 137,012.76 = 28,158.50 : x
2. Step 2: Convert to fraction form
   91,333.23/137,012.76 = 28,158.50/x
3. Step 3: Cross multiply
   91,333.23x = 137,012.76 × 28,158.50
4. Step 4: Simplify right side
   91,333.23x = 3,858,073,802.46
5. Step 5: Solve for x
   x = 3,858,073,802.46/91,333.23
6. Step 6: Final answer
   x = 42,241.73