Finding the Fourth Proportional to 91,513.60, 137,328.72 and 38,923

Step by Step Solution

1. Step 1: Write the proportion equation
   91,513.60 : 137,328.72 = 38,923 : x
2. Step 2: Convert to fraction form
   91,513.60/137,328.72 = 38,923/x
3. Step 3: Cross multiply
   91,513.60x = 137,328.72 × 38,923
4. Step 4: Simplify right side
   91,513.60x = 5,345,245,768.56
5. Step 5: Solve for x
   x = 5,345,245,768.56/91,513.60
6. Step 6: Final answer
   x = 58,409.30