Finding the Fourth Proportional to 30,656.88, 42,307.56 and 17,230.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,656.88 : 42,307.56 = 17,230.50 : x
2. Step 2: Convert to fraction form
   30,656.88/42,307.56 = 17,230.50/x
3. Step 3: Cross multiply
   30,656.88x = 42,307.56 × 17,230.50
4. Step 4: Simplify right side
   30,656.88x = 728,980,412.58
5. Step 5: Solve for x
   x = 728,980,412.58/30,656.88
6. Step 6: Final answer
   x = 23,778.69