Finding the Fourth Proportional to 117,018.77, 175,421.52 and 42,121.31

Step by Step Solution

1. Step 1: Write the proportion equation
   117,018.77 : 175,421.52 = 42,121.31 : x
2. Step 2: Convert to fraction form
   117,018.77/175,421.52 = 42,121.31/x
3. Step 3: Cross multiply
   117,018.77x = 175,421.52 × 42,121.31
4. Step 4: Simplify right side
   117,018.77x = 7,388,983,347.48
5. Step 5: Solve for x
   x = 7,388,983,347.48/117,018.77
6. Step 6: Final answer
   x = 63,143.58