Finding the Fourth Proportional to 42,515.40, 63,784.05 and 17,559.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,515.40 : 63,784.05 = 17,559.30 : x
2. Step 2: Convert to fraction form
   42,515.40/63,784.05 = 17,559.30/x
3. Step 3: Cross multiply
   42,515.40x = 63,784.05 × 17,559.30
4. Step 4: Simplify right side
   42,515.40x = 1,120,003,269.17
5. Step 5: Solve for x
   x = 1,120,003,269.17/42,515.40
6. Step 6: Final answer
   x = 26,343.47