Finding the Fourth Proportional to 91,797.21, 137,601.06 and 38,520.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,797.21 : 137,601.06 = 38,520.12 : x
2. Step 2: Convert to fraction form
   91,797.21/137,601.06 = 38,520.12/x
3. Step 3: Cross multiply
   91,797.21x = 137,601.06 × 38,520.12
4. Step 4: Simplify right side
   91,797.21x = 5,300,409,343.33
5. Step 5: Solve for x
   x = 5,300,409,343.33/91,797.21
6. Step 6: Final answer
   x = 57,740.42