Finding the Fourth Proportional to 42,910.72, 64,464.96 and 41,139.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,910.72 : 64,464.96 = 41,139.28 : x
2. Step 2: Convert to fraction form
   42,910.72/64,464.96 = 41,139.28/x
3. Step 3: Cross multiply
   42,910.72x = 64,464.96 × 41,139.28
4. Step 4: Simplify right side
   42,910.72x = 2,652,042,039.63
5. Step 5: Solve for x
   x = 2,652,042,039.63/42,910.72
6. Step 6: Final answer
   x = 61,803.72