Finding the Fourth Proportional to 102,946.51, 142,059.61 and 57,616.86

Step by Step Solution

1. Step 1: Write the proportion equation
   102,946.51 : 142,059.61 = 57,616.86 : x
2. Step 2: Convert to fraction form
   102,946.51/142,059.61 = 57,616.86/x
3. Step 3: Cross multiply
   102,946.51x = 142,059.61 × 57,616.86
4. Step 4: Simplify right side
   102,946.51x = 8,185,028,661.02
5. Step 5: Solve for x
   x = 8,185,028,661.02/102,946.51
6. Step 6: Final answer
   x = 79,507.59