Finding the Fourth Proportional to 74,725.72, 103,117.69 and 42,456.09

Step by Step Solution

1. Step 1: Write the proportion equation
   74,725.72 : 103,117.69 = 42,456.09 : x
2. Step 2: Convert to fraction form
   74,725.72/103,117.69 = 42,456.09/x
3. Step 3: Cross multiply
   74,725.72x = 103,117.69 × 42,456.09
4. Step 4: Simplify right side
   74,725.72x = 4,377,974,366.99
5. Step 5: Solve for x
   x = 4,377,974,366.99/74,725.72
6. Step 6: Final answer
   x = 58,587.25