Finding the Fourth Proportional to 58,028.41, 79,557.69 and 56,978.65

Step by Step Solution

1. Step 1: Write the proportion equation
   58,028.41 : 79,557.69 = 56,978.65 : x
2. Step 2: Convert to fraction form
   58,028.41/79,557.69 = 56,978.65/x
3. Step 3: Cross multiply
   58,028.41x = 79,557.69 × 56,978.65
4. Step 4: Simplify right side
   58,028.41x = 4,533,089,574.42
5. Step 5: Solve for x
   x = 4,533,089,574.42/58,028.41
6. Step 6: Final answer
   x = 78,118.46