Finding the Fourth Proportional to 42,967.86, 64,460.29 and 13,384.43

Step by Step Solution

1. Step 1: Write the proportion equation
   42,967.86 : 64,460.29 = 13,384.43 : x
2. Step 2: Convert to fraction form
   42,967.86/64,460.29 = 13,384.43/x
3. Step 3: Cross multiply
   42,967.86x = 64,460.29 × 13,384.43
4. Step 4: Simplify right side
   42,967.86x = 862,764,239.28
5. Step 5: Solve for x
   x = 862,764,239.28/42,967.86
6. Step 6: Final answer
   x = 20,079.29