Finding the Fourth Proportional to 91,516.42, 137,224.38 and 28,318.95

Step by Step Solution

1. Step 1: Write the proportion equation
   91,516.42 : 137,224.38 = 28,318.95 : x
2. Step 2: Convert to fraction form
   91,516.42/137,224.38 = 28,318.95/x
3. Step 3: Cross multiply
   91,516.42x = 137,224.38 × 28,318.95
4. Step 4: Simplify right side
   91,516.42x = 3,886,050,356.00
5. Step 5: Solve for x
   x = 3,886,050,356.00/91,516.42
6. Step 6: Final answer
   x = 42,462.88