Finding the Fourth Proportional to 412,826.09, 619,300.69 and 146,564.30

Step by Step Solution

1. Step 1: Write the proportion equation
   412,826.09 : 619,300.69 = 146,564.30 : x
2. Step 2: Convert to fraction form
   412,826.09/619,300.69 = 146,564.30/x
3. Step 3: Cross multiply
   412,826.09x = 619,300.69 × 146,564.30
4. Step 4: Simplify right side
   412,826.09x = 90,767,373,301.21
5. Step 5: Solve for x
   x = 90,767,373,301.21/412,826.09
6. Step 6: Final answer
   x = 219,868.31