Finding the Fourth Proportional to 123,043.56, 169,801.70 and 72,742.12

Step by Step Solution

1. Step 1: Write the proportion equation
   123,043.56 : 169,801.70 = 72,742.12 : x
2. Step 2: Convert to fraction form
   123,043.56/169,801.70 = 72,742.12/x
3. Step 3: Cross multiply
   123,043.56x = 169,801.70 × 72,742.12
4. Step 4: Simplify right side
   123,043.56x = 12,351,735,637.60
5. Step 5: Solve for x
   x = 12,351,735,637.60/123,043.56
6. Step 6: Final answer
   x = 100,385.06