Finding the Fourth Proportional to 53,569.61, 80,390.72 and 21,985.37

Step by Step Solution

1. Step 1: Write the proportion equation
   53,569.61 : 80,390.72 = 21,985.37 : x
2. Step 2: Convert to fraction form
   53,569.61/80,390.72 = 21,985.37/x
3. Step 3: Cross multiply
   53,569.61x = 80,390.72 × 21,985.37
4. Step 4: Simplify right side
   53,569.61x = 1,767,419,723.77
5. Step 5: Solve for x
   x = 1,767,419,723.77/53,569.61
6. Step 6: Final answer
   x = 32,992.95