Finding the Fourth Proportional to 65,216.16, 90,023.76 and 56,106

Step by Step Solution

1. Step 1: Write the proportion equation
   65,216.16 : 90,023.76 = 56,106 : x
2. Step 2: Convert to fraction form
   65,216.16/90,023.76 = 56,106/x
3. Step 3: Cross multiply
   65,216.16x = 90,023.76 × 56,106
4. Step 4: Simplify right side
   65,216.16x = 5,050,873,078.56
5. Step 5: Solve for x
   x = 5,050,873,078.56/65,216.16
6. Step 6: Final answer
   x = 77,448.18