Finding the Fourth Proportional to 155,947.16, 215,208.37 and 86,098.71

Step by Step Solution

1. Step 1: Write the proportion equation
   155,947.16 : 215,208.37 = 86,098.71 : x
2. Step 2: Convert to fraction form
   155,947.16/215,208.37 = 86,098.71/x
3. Step 3: Cross multiply
   155,947.16x = 215,208.37 × 86,098.71
4. Step 4: Simplify right side
   155,947.16x = 18,529,162,607.71
5. Step 5: Solve for x
   x = 18,529,162,607.71/155,947.16
6. Step 6: Final answer
   x = 118,816.93