Finding the Fourth Proportional to 46,978.40, 64,833.19 and 31,034.90

Step by Step Solution

1. Step 1: Write the proportion equation
   46,978.40 : 64,833.19 = 31,034.90 : x
2. Step 2: Convert to fraction form
   46,978.40/64,833.19 = 31,034.90/x
3. Step 3: Cross multiply
   46,978.40x = 64,833.19 × 31,034.90
4. Step 4: Simplify right side
   46,978.40x = 2,012,091,568.33
5. Step 5: Solve for x
   x = 2,012,091,568.33/46,978.40
6. Step 6: Final answer
   x = 42,830.14