Finding the Fourth Proportional to 138,370.52, 207,293.34 and 82,091.72

Step by Step Solution

1. Step 1: Write the proportion equation
   138,370.52 : 207,293.34 = 82,091.72 : x
2. Step 2: Convert to fraction form
   138,370.52/207,293.34 = 82,091.72/x
3. Step 3: Cross multiply
   138,370.52x = 207,293.34 × 82,091.72
4. Step 4: Simplify right side
   138,370.52x = 17,017,066,825.14
5. Step 5: Solve for x
   x = 17,017,066,825.14/138,370.52
6. Step 6: Final answer
   x = 122,981.88