Finding the Fourth Proportional to 91,532, 136,635.10 and 79,131.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,532 : 136,635.10 = 79,131.72 : x
2. Step 2: Convert to fraction form
   91,532/136,635.10 = 79,131.72/x
3. Step 3: Cross multiply
   91,532x = 136,635.10 × 79,131.72
4. Step 4: Simplify right side
   91,532x = 10,812,170,475.37
5. Step 5: Solve for x
   x = 10,812,170,475.37/91,532
6. Step 6: Final answer
   x = 118,124.49