Finding the Fourth Proportional to 91,429.60, 137,085.20 and 38,824.80

Step by Step Solution

1. Step 1: Write the proportion equation
   91,429.60 : 137,085.20 = 38,824.80 : x
2. Step 2: Convert to fraction form
   91,429.60/137,085.20 = 38,824.80/x
3. Step 3: Cross multiply
   91,429.60x = 137,085.20 × 38,824.80
4. Step 4: Simplify right side
   91,429.60x = 5,322,305,472.96
5. Step 5: Solve for x
   x = 5,322,305,472.96/91,429.60
6. Step 6: Final answer
   x = 58,212.06