Finding the Fourth Proportional to 45,666.18, 62,978.49 and 28,672

Step by Step Solution

1. Step 1: Write the proportion equation
   45,666.18 : 62,978.49 = 28,672 : x
2. Step 2: Convert to fraction form
   45,666.18/62,978.49 = 28,672/x
3. Step 3: Cross multiply
   45,666.18x = 62,978.49 × 28,672
4. Step 4: Simplify right side
   45,666.18x = 1,805,719,265.28
5. Step 5: Solve for x
   x = 1,805,719,265.28/45,666.18
6. Step 6: Final answer
   x = 39,541.72