Finding the Fourth Proportional to 77,956.79, 107,580.37 and 42,146.79

Step by Step Solution

1. Step 1: Write the proportion equation
   77,956.79 : 107,580.37 = 42,146.79 : x
2. Step 2: Convert to fraction form
   77,956.79/107,580.37 = 42,146.79/x
3. Step 3: Cross multiply
   77,956.79x = 107,580.37 × 42,146.79
4. Step 4: Simplify right side
   77,956.79x = 4,534,167,051.78
5. Step 5: Solve for x
   x = 4,534,167,051.78/77,956.79
6. Step 6: Final answer
   x = 58,162.57