Finding the Fourth Proportional to 91,978.34, 126,901.57 and 53,710.28

Step by Step Solution

1. Step 1: Write the proportion equation
   91,978.34 : 126,901.57 = 53,710.28 : x
2. Step 2: Convert to fraction form
   91,978.34/126,901.57 = 53,710.28/x
3. Step 3: Cross multiply
   91,978.34x = 126,901.57 × 53,710.28
4. Step 4: Simplify right side
   91,978.34x = 6,815,918,222.63
5. Step 5: Solve for x
   x = 6,815,918,222.63/91,978.34
6. Step 6: Final answer
   x = 74,103.52