Finding the Fourth Proportional to 30,520.57, 42,116.05 and 17,090.00

Step by Step Solution

1. Step 1: Write the proportion equation
   30,520.57 : 42,116.05 = 17,090.00 : x
2. Step 2: Convert to fraction form
   30,520.57/42,116.05 = 17,090.00/x
3. Step 3: Cross multiply
   30,520.57x = 42,116.05 × 17,090.00
4. Step 4: Simplify right side
   30,520.57x = 719,763,027.93
5. Step 5: Solve for x
   x = 719,763,027.93/30,520.57
6. Step 6: Final answer
   x = 23,582.88