Finding the Fourth Proportional to 91,813, 137,777.76 and 39,222.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91,813 : 137,777.76 = 39,222.88 : x
2. Step 2: Convert to fraction form
   91,813/137,777.76 = 39,222.88/x
3. Step 3: Cross multiply
   91,813x = 137,777.76 × 39,222.88
4. Step 4: Simplify right side
   91,813x = 5,404,040,547.15
5. Step 5: Solve for x
   x = 5,404,040,547.15/91,813
6. Step 6: Final answer
   x = 58,859.21