Finding the Fourth Proportional to 91,588.59, 137,391.30 and 28,409.22

Step by Step Solution

1. Step 1: Write the proportion equation
   91,588.59 : 137,391.30 = 28,409.22 : x
2. Step 2: Convert to fraction form
   91,588.59/137,391.30 = 28,409.22/x
3. Step 3: Cross multiply
   91,588.59x = 137,391.30 × 28,409.22
4. Step 4: Simplify right side
   91,588.59x = 3,903,179,667.79
5. Step 5: Solve for x
   x = 3,903,179,667.79/91,588.59
6. Step 6: Final answer
   x = 42,616.44