Finding the Fourth Proportional to 86,663.30, 130,042.98 and 42,290.42

Step by Step Solution

1. Step 1: Write the proportion equation
   86,663.30 : 130,042.98 = 42,290.42 : x
2. Step 2: Convert to fraction form
   86,663.30/130,042.98 = 42,290.42/x
3. Step 3: Cross multiply
   86,663.30x = 130,042.98 × 42,290.42
4. Step 4: Simplify right side
   86,663.30x = 5,499,571,592.04
5. Step 5: Solve for x
   x = 5,499,571,592.04/86,663.30
6. Step 6: Final answer
   x = 63,459.06