Finding the Fourth Proportional to 65,513.01, 90,316.35 and 55,400.83

Step by Step Solution

1. Step 1: Write the proportion equation
   65,513.01 : 90,316.35 = 55,400.83 : x
2. Step 2: Convert to fraction form
   65,513.01/90,316.35 = 55,400.83/x
3. Step 3: Cross multiply
   65,513.01x = 90,316.35 × 55,400.83
4. Step 4: Simplify right side
   65,513.01x = 5,003,600,752.57
5. Step 5: Solve for x
   x = 5,003,600,752.57/65,513.01
6. Step 6: Final answer
   x = 76,375.68