Finding the Fourth Proportional to 91,626.71, 137,461.59 and 28,443.60

Step by Step Solution

1. Step 1: Write the proportion equation
   91,626.71 : 137,461.59 = 28,443.60 : x
2. Step 2: Convert to fraction form
   91,626.71/137,461.59 = 28,443.60/x
3. Step 3: Cross multiply
   91,626.71x = 137,461.59 × 28,443.60
4. Step 4: Simplify right side
   91,626.71x = 3,909,902,481.32
5. Step 5: Solve for x
   x = 3,909,902,481.32/91,626.71
6. Step 6: Final answer
   x = 42,672.08