Finding the Fourth Proportional to 77,878.17, 107,471.81 and 42,068.17

Step by Step Solution

1. Step 1: Write the proportion equation
   77,878.17 : 107,471.81 = 42,068.17 : x
2. Step 2: Convert to fraction form
   77,878.17/107,471.81 = 42,068.17/x
3. Step 3: Cross multiply
   77,878.17x = 107,471.81 × 42,068.17
4. Step 4: Simplify right side
   77,878.17x = 4,521,142,373.29
5. Step 5: Solve for x
   x = 4,521,142,373.29/77,878.17
6. Step 6: Final answer
   x = 58,054.04