Finding the Fourth Proportional to 77,878.31, 107,471.96 and 42,068.31

Step by Step Solution

1. Step 1: Write the proportion equation
   77,878.31 : 107,471.96 = 42,068.31 : x
2. Step 2: Convert to fraction form
   77,878.31/107,471.96 = 42,068.31/x
3. Step 3: Cross multiply
   77,878.31x = 107,471.96 × 42,068.31
4. Step 4: Simplify right side
   77,878.31x = 4,521,164,115.15
5. Step 5: Solve for x
   x = 4,521,164,115.15/77,878.31
6. Step 6: Final answer
   x = 58,054.21