Finding the Fourth Proportional to 368,264.08, 508,128.24 and 215,272.72

Step by Step Solution

1. Step 1: Write the proportion equation
   368,264.08 : 508,128.24 = 215,272.72 : x
2. Step 2: Convert to fraction form
   368,264.08/508,128.24 = 215,272.72/x
3. Step 3: Cross multiply
   368,264.08x = 508,128.24 × 215,272.72
4. Step 4: Simplify right side
   368,264.08x = 109,386,148,333.61
5. Step 5: Solve for x
   x = 109,386,148,333.61/368,264.08
6. Step 6: Final answer
   x = 297,031.82