Finding the Fourth Proportional to 42,945.98, 64,426.14 and 13,357.89

Step by Step Solution

1. Step 1: Write the proportion equation
   42,945.98 : 64,426.14 = 13,357.89 : x
2. Step 2: Convert to fraction form
   42,945.98/64,426.14 = 13,357.89/x
3. Step 3: Cross multiply
   42,945.98x = 64,426.14 × 13,357.89
4. Step 4: Simplify right side
   42,945.98x = 860,597,291.24
5. Step 5: Solve for x
   x = 860,597,291.24/42,945.98
6. Step 6: Final answer
   x = 20,039.07