Finding the Fourth Proportional to 21,729,111.20, 32,546,427.60 and 13,194,562.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,729,111.20 : 32,546,427.60 = 13,194,562.40 : x
2. Step 2: Convert to fraction form
   21,729,111.20/32,546,427.60 = 13,194,562.40/x
3. Step 3: Cross multiply
   21,729,111.20x = 32,546,427.60 × 13,194,562.40
4. Step 4: Simplify right side
   21,729,111.20x = 429,435,869,865,282.25
5. Step 5: Solve for x
   x = 429,435,869,865,282.25/21,729,111.20
6. Step 6: Final answer
   x = 19,763,158.55