Finding the Fourth Proportional to 215,386.10, 297,324.72 and 153,336.59

Step by Step Solution

1. Step 1: Write the proportion equation
   215,386.10 : 297,324.72 = 153,336.59 : x
2. Step 2: Convert to fraction form
   215,386.10/297,324.72 = 153,336.59/x
3. Step 3: Cross multiply
   215,386.10x = 297,324.72 × 153,336.59
4. Step 4: Simplify right side
   215,386.10x = 45,590,757,200.88
5. Step 5: Solve for x
   x = 45,590,757,200.88/215,386.10
6. Step 6: Final answer
   x = 211,669.91