Finding the Fourth Proportional to 91,442, 137,111.16 and 38,072.40

Step by Step Solution

1. Step 1: Write the proportion equation
   91,442 : 137,111.16 = 38,072.40 : x
2. Step 2: Convert to fraction form
   91,442/137,111.16 = 38,072.40/x
3. Step 3: Cross multiply
   91,442x = 137,111.16 × 38,072.40
4. Step 4: Simplify right side
   91,442x = 5,220,150,927.98
5. Step 5: Solve for x
   x = 5,220,150,927.98/91,442
6. Step 6: Final answer
   x = 57,087.02