Finding the Fourth Proportional to 58,290.79, 80,246.73 and 55,612.72

Step by Step Solution

1. Step 1: Write the proportion equation
   58,290.79 : 80,246.73 = 55,612.72 : x
2. Step 2: Convert to fraction form
   58,290.79/80,246.73 = 55,612.72/x
3. Step 3: Cross multiply
   58,290.79x = 80,246.73 × 55,612.72
4. Step 4: Simplify right side
   58,290.79x = 4,462,738,926.41
5. Step 5: Solve for x
   x = 4,462,738,926.41/58,290.79
6. Step 6: Final answer
   x = 76,559.93