Finding the Fourth Proportional to 91,631.46, 137,488.50 and 58,342.89

Step by Step Solution

1. Step 1: Write the proportion equation
   91,631.46 : 137,488.50 = 58,342.89 : x
2. Step 2: Convert to fraction form
   91,631.46/137,488.50 = 58,342.89/x
3. Step 3: Cross multiply
   91,631.46x = 137,488.50 × 58,342.89
4. Step 4: Simplify right side
   91,631.46x = 8,021,476,431.77
5. Step 5: Solve for x
   x = 8,021,476,431.77/91,631.46
6. Step 6: Final answer
   x = 87,540.64