Finding the Fourth Proportional to 126,911.98, 175,116.33 and 72,439.28

Step by Step Solution

1. Step 1: Write the proportion equation
   126,911.98 : 175,116.33 = 72,439.28 : x
2. Step 2: Convert to fraction form
   126,911.98/175,116.33 = 72,439.28/x
3. Step 3: Cross multiply
   126,911.98x = 175,116.33 × 72,439.28
4. Step 4: Simplify right side
   126,911.98x = 12,685,300,642.55
5. Step 5: Solve for x
   x = 12,685,300,642.55/126,911.98
6. Step 6: Final answer
   x = 99,953.53