Finding the Fourth Proportional to 91,419.48, 126,152.37 and 53,185.05

Step by Step Solution

1. Step 1: Write the proportion equation
   91,419.48 : 126,152.37 = 53,185.05 : x
2. Step 2: Convert to fraction form
   91,419.48/126,152.37 = 53,185.05/x
3. Step 3: Cross multiply
   91,419.48x = 126,152.37 × 53,185.05
4. Step 4: Simplify right side
   91,419.48x = 6,709,420,106.07
5. Step 5: Solve for x
   x = 6,709,420,106.07/91,419.48
6. Step 6: Final answer
   x = 73,391.58