Finding the Fourth Proportional to 42,969.10, 64,450.68 and 13,384.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,969.10 : 64,450.68 = 13,384.12 : x
2. Step 2: Convert to fraction form
   42,969.10/64,450.68 = 13,384.12/x
3. Step 3: Cross multiply
   42,969.10x = 64,450.68 × 13,384.12
4. Step 4: Simplify right side
   42,969.10x = 862,615,635.20
5. Step 5: Solve for x
   x = 862,615,635.20/42,969.10
6. Step 6: Final answer
   x = 20,075.25