Finding the Fourth Proportional to 57,019.47, 78,684.54 and 31,524.21

Step by Step Solution

1. Step 1: Write the proportion equation
   57,019.47 : 78,684.54 = 31,524.21 : x
2. Step 2: Convert to fraction form
   57,019.47/78,684.54 = 31,524.21/x
3. Step 3: Cross multiply
   57,019.47x = 78,684.54 × 31,524.21
4. Step 4: Simplify right side
   57,019.47x = 2,480,467,962.71
5. Step 5: Solve for x
   x = 2,480,467,962.71/57,019.47
6. Step 6: Final answer
   x = 43,502.12