Finding the Fourth Proportional to 113,428.58, 156,540.48 and 65,682.77

Step by Step Solution

1. Step 1: Write the proportion equation
   113,428.58 : 156,540.48 = 65,682.77 : x
2. Step 2: Convert to fraction form
   113,428.58/156,540.48 = 65,682.77/x
3. Step 3: Cross multiply
   113,428.58x = 156,540.48 × 65,682.77
4. Step 4: Simplify right side
   113,428.58x = 10,282,012,343.53
5. Step 5: Solve for x
   x = 10,282,012,343.53/113,428.58
6. Step 6: Final answer
   x = 90,647.46