Finding the Fourth Proportional to 42,980.39, 64,470.29 and 23,383.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,980.39 : 64,470.29 = 23,383.50 : x
2. Step 2: Convert to fraction form
   42,980.39/64,470.29 = 23,383.50/x
3. Step 3: Cross multiply
   42,980.39x = 64,470.29 × 23,383.50
4. Step 4: Simplify right side
   42,980.39x = 1,507,540,909.30
5. Step 5: Solve for x
   x = 1,507,540,909.30/42,980.39
6. Step 6: Final answer
   x = 35,075.09