Finding the Fourth Proportional to 57,019.40, 78,685.08 and 31,868.84

Step by Step Solution

1. Step 1: Write the proportion equation
   57,019.40 : 78,685.08 = 31,868.84 : x
2. Step 2: Convert to fraction form
   57,019.40/78,685.08 = 31,868.84/x
3. Step 3: Cross multiply
   57,019.40x = 78,685.08 × 31,868.84
4. Step 4: Simplify right side
   57,019.40x = 2,507,602,224.91
5. Step 5: Solve for x
   x = 2,507,602,224.91/57,019.40
6. Step 6: Final answer
   x = 43,978.05