Finding the Fourth Proportional to 113,535.63, 156,615.21 and 65,782.50

Step by Step Solution

1. Step 1: Write the proportion equation
   113,535.63 : 156,615.21 = 65,782.50 : x
2. Step 2: Convert to fraction form
   113,535.63/156,615.21 = 65,782.50/x
3. Step 3: Cross multiply
   113,535.63x = 156,615.21 × 65,782.50
4. Step 4: Simplify right side
   113,535.63x = 10,302,540,051.83
5. Step 5: Solve for x
   x = 10,302,540,051.83/113,535.63
6. Step 6: Final answer
   x = 90,742.79