Finding the Fourth Proportional to 42,712.42, 64,016.64 and 30,235.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,712.42 : 64,016.64 = 30,235.98 : x
2. Step 2: Convert to fraction form
   42,712.42/64,016.64 = 30,235.98/x
3. Step 3: Cross multiply
   42,712.42x = 64,016.64 × 30,235.98
4. Step 4: Simplify right side
   42,712.42x = 1,935,605,846.71
5. Step 5: Solve for x
   x = 1,935,605,846.71/42,712.42
6. Step 6: Final answer
   x = 45,317.17