Finding the Fourth Proportional to 58,126.72, 79,690.76 and 57,076.96

Step by Step Solution

1. Step 1: Write the proportion equation
   58,126.72 : 79,690.76 = 57,076.96 : x
2. Step 2: Convert to fraction form
   58,126.72/79,690.76 = 57,076.96/x
3. Step 3: Cross multiply
   58,126.72x = 79,690.76 × 57,076.96
4. Step 4: Simplify right side
   58,126.72x = 4,548,506,320.89
5. Step 5: Solve for x
   x = 4,548,506,320.89/58,126.72
6. Step 6: Final answer
   x = 78,251.56