Finding the Fourth Proportional to 86,300.32, 129,456.06 and 27,138.28

Step by Step Solution

1. Step 1: Write the proportion equation
   86,300.32 : 129,456.06 = 27,138.28 : x
2. Step 2: Convert to fraction form
   86,300.32/129,456.06 = 27,138.28/x
3. Step 3: Cross multiply
   86,300.32x = 129,456.06 × 27,138.28
4. Step 4: Simplify right side
   86,300.32x = 3,513,214,803.98
5. Step 5: Solve for x
   x = 3,513,214,803.98/86,300.32
6. Step 6: Final answer
   x = 40,709.17