Finding the Fourth Proportional to 91,570.34, 137,134.06 and 79,170.05

Step by Step Solution

1. Step 1: Write the proportion equation
   91,570.34 : 137,134.06 = 79,170.05 : x
2. Step 2: Convert to fraction form
   91,570.34/137,134.06 = 79,170.05/x
3. Step 3: Cross multiply
   91,570.34x = 137,134.06 × 79,170.05
4. Step 4: Simplify right side
   91,570.34x = 10,856,910,977.14
5. Step 5: Solve for x
   x = 10,856,910,977.14/91,570.34
6. Step 6: Final answer
   x = 118,563.62