Finding the Fourth Proportional to 105,133.59, 145,080.27 and 57,386.91

Step by Step Solution

1. Step 1: Write the proportion equation
   105,133.59 : 145,080.27 = 57,386.91 : x
2. Step 2: Convert to fraction form
   105,133.59/145,080.27 = 57,386.91/x
3. Step 3: Cross multiply
   105,133.59x = 145,080.27 × 57,386.91
4. Step 4: Simplify right side
   105,133.59x = 8,325,708,397.27
5. Step 5: Solve for x
   x = 8,325,708,397.27/105,133.59
6. Step 6: Final answer
   x = 79,191.71