Finding the Fourth Proportional to 221,061,018.92, 305,058,818.86 and 121,939,596.06

Step by Step Solution

1. Step 1: Write the proportion equation
   221,061,018.92 : 305,058,818.86 = 121,939,596.06 : x
2. Step 2: Convert to fraction form
   221,061,018.92/305,058,818.86 = 121,939,596.06/x
3. Step 3: Cross multiply
   221,061,018.92x = 305,058,818.86 × 121,939,596.06
4. Step 4: Simplify right side
   221,061,018.92x = 37,198,749,146,329,112
5. Step 5: Solve for x
   x = 37,198,749,146,329,112/221,061,018.92
6. Step 6: Final answer
   x = 168,273,670.90