Finding the Fourth Proportional to 77,878.05, 107,471.63 and 42,068.05

Step by Step Solution

1. Step 1: Write the proportion equation
   77,878.05 : 107,471.63 = 42,068.05 : x
2. Step 2: Convert to fraction form
   77,878.05/107,471.63 = 42,068.05/x
3. Step 3: Cross multiply
   77,878.05x = 107,471.63 × 42,068.05
4. Step 4: Simplify right side
   77,878.05x = 4,521,121,904.42
5. Step 5: Solve for x
   x = 4,521,121,904.42/77,878.05
6. Step 6: Final answer
   x = 58,053.87