Finding the Fourth Proportional to 42,265.82, 63,356.63 and 21,141.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,265.82 : 63,356.63 = 21,141.40 : x
2. Step 2: Convert to fraction form
   42,265.82/63,356.63 = 21,141.40/x
3. Step 3: Cross multiply
   42,265.82x = 63,356.63 × 21,141.40
4. Step 4: Simplify right side
   42,265.82x = 1,339,447,857.48
5. Step 5: Solve for x
   x = 1,339,447,857.48/42,265.82
6. Step 6: Final answer
   x = 31,691.04