Finding the Fourth Proportional to 209,146.68, 288,575.82 and 118,494.72

Step by Step Solution

1. Step 1: Write the proportion equation
   209,146.68 : 288,575.82 = 118,494.72 : x
2. Step 2: Convert to fraction form
   209,146.68/288,575.82 = 118,494.72/x
3. Step 3: Cross multiply
   209,146.68x = 288,575.82 × 118,494.72
4. Step 4: Simplify right side
   209,146.68x = 34,194,710,989.67
5. Step 5: Solve for x
   x = 34,194,710,989.67/209,146.68
6. Step 6: Final answer
   x = 163,496.31