Finding the Fourth Proportional to 137,621.91, 206,141.25 and 103,971.27

Step by Step Solution

1. Step 1: Write the proportion equation
   137,621.91 : 206,141.25 = 103,971.27 : x
2. Step 2: Convert to fraction form
   137,621.91/206,141.25 = 103,971.27/x
3. Step 3: Cross multiply
   137,621.91x = 206,141.25 × 103,971.27
4. Step 4: Simplify right side
   137,621.91x = 21,432,767,561.89
5. Step 5: Solve for x
   x = 21,432,767,561.89/137,621.91
6. Step 6: Final answer
   x = 155,736.59