Finding the Fourth Proportional to 208,017.09, 287,062.20 and 112,521.78

Step by Step Solution

1. Step 1: Write the proportion equation
   208,017.09 : 287,062.20 = 112,521.78 : x
2. Step 2: Convert to fraction form
   208,017.09/287,062.20 = 112,521.78/x
3. Step 3: Cross multiply
   208,017.09x = 287,062.20 × 112,521.78
4. Step 4: Simplify right side
   208,017.09x = 32,300,749,714.72
5. Step 5: Solve for x
   x = 32,300,749,714.72/208,017.09
6. Step 6: Final answer
   x = 155,279.31