Finding the Fourth Proportional to 45,146.72, 67,763.84 and 21,789.60

Step by Step Solution

1. Step 1: Write the proportion equation
   45,146.72 : 67,763.84 = 21,789.60 : x
2. Step 2: Convert to fraction form
   45,146.72/67,763.84 = 21,789.60/x
3. Step 3: Cross multiply
   45,146.72x = 67,763.84 × 21,789.60
4. Step 4: Simplify right side
   45,146.72x = 1,476,546,968.06
5. Step 5: Solve for x
   x = 1,476,546,968.06/45,146.72
6. Step 6: Final answer
   x = 32,705.52