Finding the Fourth Proportional to 155,978.04, 215,249.69 and 84,358.06

Step by Step Solution

1. Step 1: Write the proportion equation
   155,978.04 : 215,249.69 = 84,358.06 : x
2. Step 2: Convert to fraction form
   155,978.04/215,249.69 = 84,358.06/x
3. Step 3: Cross multiply
   155,978.04x = 215,249.69 × 84,358.06
4. Step 4: Simplify right side
   155,978.04x = 18,158,045,936.77
5. Step 5: Solve for x
   x = 18,158,045,936.77/155,978.04
6. Step 6: Final answer
   x = 116,414.12