Finding the Fourth Proportional to 415,807.98, 623,788.89 and 131,570.07

Step by Step Solution

1. Step 1: Write the proportion equation
   415,807.98 : 623,788.89 = 131,570.07 : x
2. Step 2: Convert to fraction form
   415,807.98/623,788.89 = 131,570.07/x
3. Step 3: Cross multiply
   415,807.98x = 623,788.89 × 131,570.07
4. Step 4: Simplify right side
   415,807.98x = 82,071,947,922.52
5. Step 5: Solve for x
   x = 82,071,947,922.52/415,807.98
6. Step 6: Final answer
   x = 197,379.44