Finding the Fourth Proportional to 102,942.51, 142,054.10 and 57,612.86

Step by Step Solution

1. Step 1: Write the proportion equation
   102,942.51 : 142,054.10 = 57,612.86 : x
2. Step 2: Convert to fraction form
   102,942.51/142,054.10 = 57,612.86/x
3. Step 3: Cross multiply
   102,942.51x = 142,054.10 × 57,612.86
4. Step 4: Simplify right side
   102,942.51x = 8,184,141,977.39
5. Step 5: Solve for x
   x = 8,184,141,977.39/102,942.51
6. Step 6: Final answer
   x = 79,502.06