Finding the Fourth Proportional to 42,212.50, 63,340.62 and 21,436

Step by Step Solution

1. Step 1: Write the proportion equation
   42,212.50 : 63,340.62 = 21,436 : x
2. Step 2: Convert to fraction form
   42,212.50/63,340.62 = 21,436/x
3. Step 3: Cross multiply
   42,212.50x = 63,340.62 × 21,436
4. Step 4: Simplify right side
   42,212.50x = 1,357,769,530.32
5. Step 5: Solve for x
   x = 1,357,769,530.32/42,212.50
6. Step 6: Final answer
   x = 32,165.11