Finding the Fourth Proportional to 91,810.23, 137,678.49 and 28,609.58

Step by Step Solution

1. Step 1: Write the proportion equation
   91,810.23 : 137,678.49 = 28,609.58 : x
2. Step 2: Convert to fraction form
   91,810.23/137,678.49 = 28,609.58/x
3. Step 3: Cross multiply
   91,810.23x = 137,678.49 × 28,609.58
4. Step 4: Simplify right side
   91,810.23x = 3,938,923,085.54
5. Step 5: Solve for x
   x = 3,938,923,085.54/91,810.23
6. Step 6: Final answer
   x = 42,902.88