Finding the Fourth Proportional to 91,954, 137,126.31 and 91,113.21

Step by Step Solution

1. Step 1: Write the proportion equation
   91,954 : 137,126.31 = 91,113.21 : x
2. Step 2: Convert to fraction form
   91,954/137,126.31 = 91,113.21/x
3. Step 3: Cross multiply
   91,954x = 137,126.31 × 91,113.21
4. Step 4: Simplify right side
   91,954x = 12,494,018,279.56
5. Step 5: Solve for x
   x = 12,494,018,279.56/91,954
6. Step 6: Final answer
   x = 135,872.48