Finding the Fourth Proportional to 104,588.52, 156,733.02 and 81,105

Step by Step Solution

1. Step 1: Write the proportion equation
   104,588.52 : 156,733.02 = 81,105 : x
2. Step 2: Convert to fraction form
   104,588.52/156,733.02 = 81,105/x
3. Step 3: Cross multiply
   104,588.52x = 156,733.02 × 81,105
4. Step 4: Simplify right side
   104,588.52x = 12,711,831,587.10
5. Step 5: Solve for x
   x = 12,711,831,587.10/104,588.52
6. Step 6: Final answer
   x = 121,541.37