Finding the Fourth Proportional to 91,697.46, 137,565.99 and 28,516.35

Step by Step Solution

1. Step 1: Write the proportion equation
   91,697.46 : 137,565.99 = 28,516.35 : x
2. Step 2: Convert to fraction form
   91,697.46/137,565.99 = 28,516.35/x
3. Step 3: Cross multiply
   91,697.46x = 137,565.99 × 28,516.35
4. Step 4: Simplify right side
   91,697.46x = 3,922,879,776.35
5. Step 5: Solve for x
   x = 3,922,879,776.35/91,697.46
6. Step 6: Final answer
   x = 42,780.68