Finding the Fourth Proportional to 42,837.50, 64,282.82 and 20,653.13

Step by Step Solution

1. Step 1: Write the proportion equation
   42,837.50 : 64,282.82 = 20,653.13 : x
2. Step 2: Convert to fraction form
   42,837.50/64,282.82 = 20,653.13/x
3. Step 3: Cross multiply
   42,837.50x = 64,282.82 × 20,653.13
4. Step 4: Simplify right side
   42,837.50x = 1,327,641,013.55
5. Step 5: Solve for x
   x = 1,327,641,013.55/42,837.50
6. Step 6: Final answer
   x = 30,992.50