Finding the Fourth Proportional to 212,397.31, 293,109.33 and 121,758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   212,397.31 : 293,109.33 = 121,758.72 : x
2. Step 2: Convert to fraction form
   212,397.31/293,109.33 = 121,758.72/x
3. Step 3: Cross multiply
   212,397.31x = 293,109.33 × 121,758.72
4. Step 4: Simplify right side
   212,397.31x = 35,688,616,840.86
5. Step 5: Solve for x
   x = 35,688,616,840.86/212,397.31
6. Step 6: Final answer
   x = 168,027.63