Finding the Fourth Proportional to 77,955.59, 107,578.72 and 42,145.59

Step by Step Solution

1. Step 1: Write the proportion equation
   77,955.59 : 107,578.72 = 42,145.59 : x
2. Step 2: Convert to fraction form
   77,955.59/107,578.72 = 42,145.59/x
3. Step 3: Cross multiply
   77,955.59x = 107,578.72 × 42,145.59
4. Step 4: Simplify right side
   77,955.59x = 4,533,968,625.84
5. Step 5: Solve for x
   x = 4,533,968,625.84/77,955.59
6. Step 6: Final answer
   x = 58,160.92