Finding the Fourth Proportional to 113,438.58, 156,554.28 and 65,692.78

Step by Step Solution

1. Step 1: Write the proportion equation
   113,438.58 : 156,554.28 = 65,692.78 : x
2. Step 2: Convert to fraction form
   113,438.58/156,554.28 = 65,692.78/x
3. Step 3: Cross multiply
   113,438.58x = 156,554.28 × 65,692.78
4. Step 4: Simplify right side
   113,438.58x = 10,284,485,874.10
5. Step 5: Solve for x
   x = 10,284,485,874.10/113,438.58
6. Step 6: Final answer
   x = 90,661.27