Finding the Fourth Proportional to 113,142.81, 156,119.73 and 65,386.94

Step by Step Solution

1. Step 1: Write the proportion equation
   113,142.81 : 156,119.73 = 65,386.94 : x
2. Step 2: Convert to fraction form
   113,142.81/156,119.73 = 65,386.94/x
3. Step 3: Cross multiply
   113,142.81x = 156,119.73 × 65,386.94
4. Step 4: Simplify right side
   113,142.81x = 10,208,191,418.33
5. Step 5: Solve for x
   x = 10,208,191,418.33/113,142.81
6. Step 6: Final answer
   x = 90,223.95