Finding the Fourth Proportional to 21,557.83, 29,747.82 and 19,970.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,557.83 : 29,747.82 = 19,970.94 : x
2. Step 2: Convert to fraction form
   21,557.83/29,747.82 = 19,970.94/x
3. Step 3: Cross multiply
   21,557.83x = 29,747.82 × 19,970.94
4. Step 4: Simplify right side
   21,557.83x = 594,091,928.35
5. Step 5: Solve for x
   x = 594,091,928.35/21,557.83
6. Step 6: Final answer
   x = 27,558.06