Finding the Fourth Proportional to 212,678.72, 293,517.31 and 158,870.31

Step by Step Solution

1. Step 1: Write the proportion equation
   212,678.72 : 293,517.31 = 158,870.31 : x
2. Step 2: Convert to fraction form
   212,678.72/293,517.31 = 158,870.31/x
3. Step 3: Cross multiply
   212,678.72x = 293,517.31 × 158,870.31
4. Step 4: Simplify right side
   212,678.72x = 46,631,185,235.71
5. Step 5: Solve for x
   x = 46,631,185,235.71/212,678.72
6. Step 6: Final answer
   x = 219,256.47