Finding the Fourth Proportional to 124,928.79, 172,458.01 and 79,667.61

Step by Step Solution

1. Step 1: Write the proportion equation
   124,928.79 : 172,458.01 = 79,667.61 : x
2. Step 2: Convert to fraction form
   124,928.79/172,458.01 = 79,667.61/x
3. Step 3: Cross multiply
   124,928.79x = 172,458.01 × 79,667.61
4. Step 4: Simplify right side
   124,928.79x = 13,739,317,482.06
5. Step 5: Solve for x
   x = 13,739,317,482.06/124,928.79
6. Step 6: Final answer
   x = 109,977.19