Finding the Fourth Proportional to 43,070.52, 64,605.89 and 13,490.94

Step by Step Solution

1. Step 1: Write the proportion equation
   43,070.52 : 64,605.89 = 13,490.94 : x
2. Step 2: Convert to fraction form
   43,070.52/64,605.89 = 13,490.94/x
3. Step 3: Cross multiply
   43,070.52x = 64,605.89 × 13,490.94
4. Step 4: Simplify right side
   43,070.52x = 871,594,185.64
5. Step 5: Solve for x
   x = 871,594,185.64/43,070.52
6. Step 6: Final answer
   x = 20,236.44