Finding the Fourth Proportional to 91,591.02, 137,406.25 and 28,409.87

Step by Step Solution

1. Step 1: Write the proportion equation
   91,591.02 : 137,406.25 = 28,409.87 : x
2. Step 2: Convert to fraction form
   91,591.02/137,406.25 = 28,409.87/x
3. Step 3: Cross multiply
   91,591.02x = 137,406.25 × 28,409.87
4. Step 4: Simplify right side
   91,591.02x = 3,903,694,078.72
5. Step 5: Solve for x
   x = 3,903,694,078.72/91,591.02
6. Step 6: Final answer
   x = 42,620.93