Finding the Fourth Proportional to 103,340.72, 155,011.91 and 28,465

Step by Step Solution

1. Step 1: Write the proportion equation
   103,340.72 : 155,011.91 = 28,465 : x
2. Step 2: Convert to fraction form
   103,340.72/155,011.91 = 28,465/x
3. Step 3: Cross multiply
   103,340.72x = 155,011.91 × 28,465
4. Step 4: Simplify right side
   103,340.72x = 4,412,414,018.15
5. Step 5: Solve for x
   x = 4,412,414,018.15/103,340.72
6. Step 6: Final answer
   x = 42,697.73