Finding the Fourth Proportional to 42,735.65, 64,116.42 and 30,279.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,735.65 : 64,116.42 = 30,279.77 : x
2. Step 2: Convert to fraction form
   42,735.65/64,116.42 = 30,279.77/x
3. Step 3: Cross multiply
   42,735.65x = 64,116.42 × 30,279.77
4. Step 4: Simplify right side
   42,735.65x = 1,941,430,450.82
5. Step 5: Solve for x
   x = 1,941,430,450.82/42,735.65
6. Step 6: Final answer
   x = 45,428.83