Finding the Fourth Proportional to 42,887.04, 64,355.92 and 20,723.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,887.04 : 64,355.92 = 20,723.28 : x
2. Step 2: Convert to fraction form
   42,887.04/64,355.92 = 20,723.28/x
3. Step 3: Cross multiply
   42,887.04x = 64,355.92 × 20,723.28
4. Step 4: Simplify right side
   42,887.04x = 1,333,665,749.82
5. Step 5: Solve for x
   x = 1,333,665,749.82/42,887.04
6. Step 6: Final answer
   x = 31,097.17