Finding the Fourth Proportional to 91,329, 137,034.54 and 58,040.43

Step by Step Solution

1. Step 1: Write the proportion equation
   91,329 : 137,034.54 = 58,040.43 : x
2. Step 2: Convert to fraction form
   91,329/137,034.54 = 58,040.43/x
3. Step 3: Cross multiply
   91,329x = 137,034.54 × 58,040.43
4. Step 4: Simplify right side
   91,329x = 7,953,543,626.45
5. Step 5: Solve for x
   x = 7,953,543,626.45/91,329
6. Step 6: Final answer
   x = 87,086.73