Finding the Fourth Proportional to 58,308.21, 80,270.60 and 55,630.08

Step by Step Solution

1. Step 1: Write the proportion equation
   58,308.21 : 80,270.60 = 55,630.08 : x
2. Step 2: Convert to fraction form
   58,308.21/80,270.60 = 55,630.08/x
3. Step 3: Cross multiply
   58,308.21x = 80,270.60 × 55,630.08
4. Step 4: Simplify right side
   58,308.21x = 4,465,459,621.50
5. Step 5: Solve for x
   x = 4,465,459,621.50/58,308.21
6. Step 6: Final answer
   x = 76,583.72