Finding the Fourth Proportional to 58,478.16, 80,699.80 and 31,620.60

Step by Step Solution

1. Step 1: Write the proportion equation
   58,478.16 : 80,699.80 = 31,620.60 : x
2. Step 2: Convert to fraction form
   58,478.16/80,699.80 = 31,620.60/x
3. Step 3: Cross multiply
   58,478.16x = 80,699.80 × 31,620.60
4. Step 4: Simplify right side
   58,478.16x = 2,551,776,016.83
5. Step 5: Solve for x
   x = 2,551,776,016.83/58,478.16
6. Step 6: Final answer
   x = 43,636.39