Finding the Fourth Proportional to 42,767.67, 64,103.70 and 17,790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,767.67 : 64,103.70 = 17,790.72 : x
2. Step 2: Convert to fraction form
   42,767.67/64,103.70 = 17,790.72/x
3. Step 3: Cross multiply
   42,767.67x = 64,103.70 × 17,790.72
4. Step 4: Simplify right side
   42,767.67x = 1,140,450,977.66
5. Step 5: Solve for x
   x = 1,140,450,977.66/42,767.67
6. Step 6: Final answer
   x = 26,666.19