Finding the Fourth Proportional to 43,300.78, 65,008.26 and 42,802.62

Step by Step Solution

1. Step 1: Write the proportion equation
   43,300.78 : 65,008.26 = 42,802.62 : x
2. Step 2: Convert to fraction form
   43,300.78/65,008.26 = 42,802.62/x
3. Step 3: Cross multiply
   43,300.78x = 65,008.26 × 42,802.62
4. Step 4: Simplify right side
   43,300.78x = 2,782,523,849.64
5. Step 5: Solve for x
   x = 2,782,523,849.64/43,300.78
6. Step 6: Final answer
   x = 64,260.36