Finding the Fourth Proportional to 91,690.27, 137,582.79 and 39,085.63

Step by Step Solution

1. Step 1: Write the proportion equation
   91,690.27 : 137,582.79 = 39,085.63 : x
2. Step 2: Convert to fraction form
   91,690.27/137,582.79 = 39,085.63/x
3. Step 3: Cross multiply
   91,690.27x = 137,582.79 × 39,085.63
4. Step 4: Simplify right side
   91,690.27x = 5,377,510,024.31
5. Step 5: Solve for x
   x = 5,377,510,024.31/91,690.27
6. Step 6: Final answer
   x = 58,648.64