Finding the Fourth Proportional to 104,742.10, 156,940.35 and 89,190.10

Step by Step Solution

1. Step 1: Write the proportion equation
   104,742.10 : 156,940.35 = 89,190.10 : x
2. Step 2: Convert to fraction form
   104,742.10/156,940.35 = 89,190.10/x
3. Step 3: Cross multiply
   104,742.10x = 156,940.35 × 89,190.10
4. Step 4: Simplify right side
   104,742.10x = 13,997,525,510.54
5. Step 5: Solve for x
   x = 13,997,525,510.54/104,742.10
6. Step 6: Final answer
   x = 133,638.01