Finding the Fourth Proportional to 91,638.60, 137,414.76 and 35,505

Step by Step Solution

1. Step 1: Write the proportion equation
   91,638.60 : 137,414.76 = 35,505 : x
2. Step 2: Convert to fraction form
   91,638.60/137,414.76 = 35,505/x
3. Step 3: Cross multiply
   91,638.60x = 137,414.76 × 35,505
4. Step 4: Simplify right side
   91,638.60x = 4,878,911,053.80
5. Step 5: Solve for x
   x = 4,878,911,053.80/91,638.60
6. Step 6: Final answer
   x = 53,240.79