Finding the Fourth Proportional to 25,091.34, 34,611.62 and 15,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   25,091.34 : 34,611.62 = 15,643.50 : x
2. Step 2: Convert to fraction form
   25,091.34/34,611.62 = 15,643.50/x
3. Step 3: Cross multiply
   25,091.34x = 34,611.62 × 15,643.50
4. Step 4: Simplify right side
   25,091.34x = 541,446,799.25
5. Step 5: Solve for x
   x = 541,446,799.25/25,091.34
6. Step 6: Final answer
   x = 21,579.03