Finding the Fourth Proportional to 155,936.16, 215,191.53 and 84,315.96

Step by Step Solution

1. Step 1: Write the proportion equation
   155,936.16 : 215,191.53 = 84,315.96 : x
2. Step 2: Convert to fraction form
   155,936.16/215,191.53 = 84,315.96/x
3. Step 3: Cross multiply
   155,936.16x = 215,191.53 × 84,315.96
4. Step 4: Simplify right side
   155,936.16x = 18,144,080,435.82
5. Step 5: Solve for x
   x = 18,144,080,435.82/155,936.16
6. Step 6: Final answer
   x = 116,355.82