Finding the Fourth Proportional to 113,518.94, 156,492.47 and 79,421.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,518.94 : 156,492.47 = 79,421.78 : x
2. Step 2: Convert to fraction form
   113,518.94/156,492.47 = 79,421.78/x
3. Step 3: Cross multiply
   113,518.94x = 156,492.47 × 79,421.78
4. Step 4: Simplify right side
   113,518.94x = 12,428,911,113.78
5. Step 5: Solve for x
   x = 12,428,911,113.78/113,518.94
6. Step 6: Final answer
   x = 109,487.56