Finding the Fourth Proportional to 73,006.63, 109,521.78 and 28,609.31

Step by Step Solution

1. Step 1: Write the proportion equation
   73,006.63 : 109,521.78 = 28,609.31 : x
2. Step 2: Convert to fraction form
   73,006.63/109,521.78 = 28,609.31/x
3. Step 3: Cross multiply
   73,006.63x = 109,521.78 × 28,609.31
4. Step 4: Simplify right side
   73,006.63x = 3,133,342,555.77
5. Step 5: Solve for x
   x = 3,133,342,555.77/73,006.63
6. Step 6: Final answer
   x = 42,918.60