Finding the Fourth Proportional to 105,116, 145,062.72 and 57,373.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,116 : 145,062.72 = 57,373.76 : x
2. Step 2: Convert to fraction form
   105,116/145,062.72 = 57,373.76/x
3. Step 3: Cross multiply
   105,116x = 145,062.72 × 57,373.76
4. Step 4: Simplify right side
   105,116x = 8,322,793,682.23
5. Step 5: Solve for x
   x = 8,322,793,682.23/105,116
6. Step 6: Final answer
   x = 79,177.23