Finding the Fourth Proportional to 209,870.48, 289,631.52 and 118,018.67

Step by Step Solution

1. Step 1: Write the proportion equation
   209,870.48 : 289,631.52 = 118,018.67 : x
2. Step 2: Convert to fraction form
   209,870.48/289,631.52 = 118,018.67/x
3. Step 3: Cross multiply
   209,870.48x = 289,631.52 × 118,018.67
4. Step 4: Simplify right side
   209,870.48x = 34,181,926,780.48
5. Step 5: Solve for x
   x = 34,181,926,780.48/209,870.48
6. Step 6: Final answer
   x = 162,871.53