Finding the Fourth Proportional to 46,690.98, 64,413 and 31,578.05

Step by Step Solution

1. Step 1: Write the proportion equation
   46,690.98 : 64,413 = 31,578.05 : x
2. Step 2: Convert to fraction form
   46,690.98/64,413 = 31,578.05/x
3. Step 3: Cross multiply
   46,690.98x = 64,413 × 31,578.05
4. Step 4: Simplify right side
   46,690.98x = 2,034,036,612.59
5. Step 5: Solve for x
   x = 2,034,036,612.59/46,690.98
6. Step 6: Final answer
   x = 43,563.80