Finding the Fourth Proportional to 126,838.72, 175,038.72 and 76,528

Step by Step Solution

1. Step 1: Write the proportion equation
   126,838.72 : 175,038.72 = 76,528 : x
2. Step 2: Convert to fraction form
   126,838.72/175,038.72 = 76,528/x
3. Step 3: Cross multiply
   126,838.72x = 175,038.72 × 76,528
4. Step 4: Simplify right side
   126,838.72x = 13,395,363,164.16
5. Step 5: Solve for x
   x = 13,395,363,164.16/126,838.72
6. Step 6: Final answer
   x = 105,609.42