Finding the Fourth Proportional to 105,288.59, 145,298.27 and 57,541.93

Step by Step Solution

1. Step 1: Write the proportion equation
   105,288.59 : 145,298.27 = 57,541.93 : x
2. Step 2: Convert to fraction form
   105,288.59/145,298.27 = 57,541.93/x
3. Step 3: Cross multiply
   105,288.59x = 145,298.27 × 57,541.93
4. Step 4: Simplify right side
   105,288.59x = 8,360,742,662.07
5. Step 5: Solve for x
   x = 8,360,742,662.07/105,288.59
6. Step 6: Final answer
   x = 79,407.87