Finding the Fourth Proportional to 156,105.77, 215,426.59 and 84,485.77

Step by Step Solution

1. Step 1: Write the proportion equation
   156,105.77 : 215,426.59 = 84,485.77 : x
2. Step 2: Convert to fraction form
   156,105.77/215,426.59 = 84,485.77/x
3. Step 3: Cross multiply
   156,105.77x = 215,426.59 × 84,485.77
4. Step 4: Simplify right side
   156,105.77x = 18,200,480,584.84
5. Step 5: Solve for x
   x = 18,200,480,584.84/156,105.77
6. Step 6: Final answer
   x = 116,590.70