Finding the Fourth Proportional to 42,733.98, 64,089.09 and 17,780.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,733.98 : 64,089.09 = 17,780.58 : x
2. Step 2: Convert to fraction form
   42,733.98/64,089.09 = 17,780.58/x
3. Step 3: Cross multiply
   42,733.98x = 64,089.09 × 17,780.58
4. Step 4: Simplify right side
   42,733.98x = 1,139,541,191.87
5. Step 5: Solve for x
   x = 1,139,541,191.87/42,733.98
6. Step 6: Final answer
   x = 26,665.93