Finding the Fourth Proportional to 420,364.50, 580,100.93 and 229,377.30

Step by Step Solution

1. Step 1: Write the proportion equation
   420,364.50 : 580,100.93 = 229,377.30 : x
2. Step 2: Convert to fraction form
   420,364.50/580,100.93 = 229,377.30/x
3. Step 3: Cross multiply
   420,364.50x = 580,100.93 × 229,377.30
4. Step 4: Simplify right side
   420,364.50x = 133,061,985,050.89
5. Step 5: Solve for x
   x = 133,061,985,050.89/420,364.50
6. Step 6: Final answer
   x = 316,539.54