Finding the Fourth Proportional to 91,515.42, 137,222.88 and 28,317.95

Step by Step Solution

1. Step 1: Write the proportion equation
   91,515.42 : 137,222.88 = 28,317.95 : x
2. Step 2: Convert to fraction form
   91,515.42/137,222.88 = 28,317.95/x
3. Step 3: Cross multiply
   91,515.42x = 137,222.88 × 28,317.95
4. Step 4: Simplify right side
   91,515.42x = 3,885,871,148.85
5. Step 5: Solve for x
   x = 3,885,871,148.85/91,515.42
6. Step 6: Final answer
   x = 42,461.38