Finding the Fourth Proportional to 57,019.52, 78,687.04 and 31,870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   57,019.52 : 78,687.04 = 31,870.08 : x
2. Step 2: Convert to fraction form
   57,019.52/78,687.04 = 31,870.08/x
3. Step 3: Cross multiply
   57,019.52x = 78,687.04 × 31,870.08
4. Step 4: Simplify right side
   57,019.52x = 2,507,762,259.76
5. Step 5: Solve for x
   x = 2,507,762,259.76/57,019.52
6. Step 6: Final answer
   x = 43,980.77