Finding the Fourth Proportional to 42,964.66, 64,442.22 and 13,380.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,964.66 : 64,442.22 = 13,380.02 : x
2. Step 2: Convert to fraction form
   42,964.66/64,442.22 = 13,380.02/x
3. Step 3: Cross multiply
   42,964.66x = 64,442.22 × 13,380.02
4. Step 4: Simplify right side
   42,964.66x = 862,238,061.72
5. Step 5: Solve for x
   x = 862,238,061.72/42,964.66
6. Step 6: Final answer
   x = 20,068.54