Finding the Fourth Proportional to 42,212, 63,339.87 and 21,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,212 : 63,339.87 = 21,435.50 : x
2. Step 2: Convert to fraction form
   42,212/63,339.87 = 21,435.50/x
3. Step 3: Cross multiply
   42,212x = 63,339.87 × 21,435.50
4. Step 4: Simplify right side
   42,212x = 1,357,721,783.39
5. Step 5: Solve for x
   x = 1,357,721,783.39/42,212
6. Step 6: Final answer
   x = 32,164.36