Finding the Fourth Proportional to 57,875.72, 86,814.63 and 20,434.88

Step by Step Solution

1. Step 1: Write the proportion equation
   57,875.72 : 86,814.63 = 20,434.88 : x
2. Step 2: Convert to fraction form
   57,875.72/86,814.63 = 20,434.88/x
3. Step 3: Cross multiply
   57,875.72x = 86,814.63 × 20,434.88
4. Step 4: Simplify right side
   57,875.72x = 1,774,046,546.29
5. Step 5: Solve for x
   x = 1,774,046,546.29/57,875.72
6. Step 6: Final answer
   x = 30,652.69