Finding the Fourth Proportional to 42,018.80, 57,985.20 and 22,898.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,018.80 : 57,985.20 = 22,898.75 : x
2. Step 2: Convert to fraction form
   42,018.80/57,985.20 = 22,898.75/x
3. Step 3: Cross multiply
   42,018.80x = 57,985.20 × 22,898.75
4. Step 4: Simplify right side
   42,018.80x = 1,327,788,308.57
5. Step 5: Solve for x
   x = 1,327,788,308.57/42,018.80
6. Step 6: Final answer
   x = 31,599.87