Finding the Fourth Proportional to 113,820.48, 157,040.84 and 65,419.91

Step by Step Solution

1. Step 1: Write the proportion equation
   113,820.48 : 157,040.84 = 65,419.91 : x
2. Step 2: Convert to fraction form
   113,820.48/157,040.84 = 65,419.91/x
3. Step 3: Cross multiply
   113,820.48x = 157,040.84 × 65,419.91
4. Step 4: Simplify right side
   113,820.48x = 10,273,597,619.12
5. Step 5: Solve for x
   x = 10,273,597,619.12/113,820.48
6. Step 6: Final answer
   x = 90,261.42