Finding the Fourth Proportional to 42,255, 63,404.37 and 21,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,255 : 63,404.37 = 21,478.50 : x
2. Step 2: Convert to fraction form
   42,255/63,404.37 = 21,478.50/x
3. Step 3: Cross multiply
   42,255x = 63,404.37 × 21,478.50
4. Step 4: Simplify right side
   42,255x = 1,361,830,761.05
5. Step 5: Solve for x
   x = 1,361,830,761.05/42,255
6. Step 6: Final answer
   x = 32,228.87