Finding the Fourth Proportional to 42,503.31, 63,767.31 and 18,810

Step by Step Solution

1. Step 1: Write the proportion equation
   42,503.31 : 63,767.31 = 18,810 : x
2. Step 2: Convert to fraction form
   42,503.31/63,767.31 = 18,810/x
3. Step 3: Cross multiply
   42,503.31x = 63,767.31 × 18,810
4. Step 4: Simplify right side
   42,503.31x = 1,199,463,101.10
5. Step 5: Solve for x
   x = 1,199,463,101.10/42,503.31
6. Step 6: Final answer
   x = 28,220.46