Finding the Fourth Proportional to 46,618.72, 64,357.66 and 31,590.78

Step by Step Solution

1. Step 1: Write the proportion equation
   46,618.72 : 64,357.66 = 31,590.78 : x
2. Step 2: Convert to fraction form
   46,618.72/64,357.66 = 31,590.78/x
3. Step 3: Cross multiply
   46,618.72x = 64,357.66 × 31,590.78
4. Step 4: Simplify right side
   46,618.72x = 2,033,108,678.37
5. Step 5: Solve for x
   x = 2,033,108,678.37/46,618.72
6. Step 6: Final answer
   x = 43,611.42