Finding the Fourth Proportional to 137,559.93, 206,369.59 and 42,788.31

Step by Step Solution

1. Step 1: Write the proportion equation
   137,559.93 : 206,369.59 = 42,788.31 : x
2. Step 2: Convert to fraction form
   137,559.93/206,369.59 = 42,788.31/x
3. Step 3: Cross multiply
   137,559.93x = 206,369.59 × 42,788.31
4. Step 4: Simplify right side
   137,559.93x = 8,830,205,991.49
5. Step 5: Solve for x
   x = 8,830,205,991.49/137,559.93
6. Step 6: Final answer
   x = 64,191.70