Finding the Fourth Proportional to 77,919.05, 107,528.31 and 42,109.04

Step by Step Solution

1. Step 1: Write the proportion equation
   77,919.05 : 107,528.31 = 42,109.04 : x
2. Step 2: Convert to fraction form
   77,919.05/107,528.31 = 42,109.04/x
3. Step 3: Cross multiply
   77,919.05x = 107,528.31 × 42,109.04
4. Step 4: Simplify right side
   77,919.05x = 4,527,913,369.28
5. Step 5: Solve for x
   x = 4,527,913,369.28/77,919.05
6. Step 6: Final answer
   x = 58,110.48