Finding the Fourth Proportional to 77,942.08, 107,559.42 and 42,131.80

Step by Step Solution

1. Step 1: Write the proportion equation
   77,942.08 : 107,559.42 = 42,131.80 : x
2. Step 2: Convert to fraction form
   77,942.08/107,559.42 = 42,131.80/x
3. Step 3: Cross multiply
   77,942.08x = 107,559.42 × 42,131.80
4. Step 4: Simplify right side
   77,942.08x = 4,531,671,971.56
5. Step 5: Solve for x
   x = 4,531,671,971.56/77,942.08
6. Step 6: Final answer
   x = 58,141.53