Finding the Fourth Proportional to 79,122.79, 109,186.72 and 45,142.28

Step by Step Solution

1. Step 1: Write the proportion equation
   79,122.79 : 109,186.72 = 45,142.28 : x
2. Step 2: Convert to fraction form
   79,122.79/109,186.72 = 45,142.28/x
3. Step 3: Cross multiply
   79,122.79x = 109,186.72 × 45,142.28
4. Step 4: Simplify right side
   79,122.79x = 4,928,937,486.52
5. Step 5: Solve for x
   x = 4,928,937,486.52/79,122.79
6. Step 6: Final answer
   x = 62,294.79