Finding the Fourth Proportional to 43,809.30, 65,730.15 and 42,189.30

Step by Step Solution

1. Step 1: Write the proportion equation
   43,809.30 : 65,730.15 = 42,189.30 : x
2. Step 2: Convert to fraction form
   43,809.30/65,730.15 = 42,189.30/x
3. Step 3: Cross multiply
   43,809.30x = 65,730.15 × 42,189.30
4. Step 4: Simplify right side
   43,809.30x = 2,773,109,017.40
5. Step 5: Solve for x
   x = 2,773,109,017.40/43,809.30
6. Step 6: Final answer
   x = 63,299.55