Finding the Fourth Proportional to 412,761.32, 619,203.50 and 146,499.55

Step by Step Solution

1. Step 1: Write the proportion equation
   412,761.32 : 619,203.50 = 146,499.55 : x
2. Step 2: Convert to fraction form
   412,761.32/619,203.50 = 146,499.55/x
3. Step 3: Cross multiply
   412,761.32x = 619,203.50 × 146,499.55
4. Step 4: Simplify right side
   412,761.32x = 90,713,030,279.91
5. Step 5: Solve for x
   x = 90,713,030,279.91/412,761.32
6. Step 6: Final answer
   x = 219,771.15