Finding the Fourth Proportional to 124,667.60, 172,018.49 and 73,688.63

Step by Step Solution

1. Step 1: Write the proportion equation
   124,667.60 : 172,018.49 = 73,688.63 : x
2. Step 2: Convert to fraction form
   124,667.60/172,018.49 = 73,688.63/x
3. Step 3: Cross multiply
   124,667.60x = 172,018.49 × 73,688.63
4. Step 4: Simplify right side
   124,667.60x = 12,675,805,634.23
5. Step 5: Solve for x
   x = 12,675,805,634.23/124,667.60
6. Step 6: Final answer
   x = 101,676.83