Finding the Fourth Proportional to 67,938.69, 101,875.23 and 28,485.21

Step by Step Solution

1. Step 1: Write the proportion equation
   67,938.69 : 101,875.23 = 28,485.21 : x
2. Step 2: Convert to fraction form
   67,938.69/101,875.23 = 28,485.21/x
3. Step 3: Cross multiply
   67,938.69x = 101,875.23 × 28,485.21
4. Step 4: Simplify right side
   67,938.69x = 2,901,937,320.35
5. Step 5: Solve for x
   x = 2,901,937,320.35/67,938.69
6. Step 6: Final answer
   x = 42,714.06