Finding the Fourth Proportional to 67,878.19, 101,856.96 and 28,432

Step by Step Solution

1. Step 1: Write the proportion equation
   67,878.19 : 101,856.96 = 28,432 : x
2. Step 2: Convert to fraction form
   67,878.19/101,856.96 = 28,432/x
3. Step 3: Cross multiply
   67,878.19x = 101,856.96 × 28,432
4. Step 4: Simplify right side
   67,878.19x = 2,895,997,086.72
5. Step 5: Solve for x
   x = 2,895,997,086.72/67,878.19
6. Step 6: Final answer
   x = 42,664.62