Finding the Fourth Proportional to 288,992.38, 433,444.83 and 78,646.72

Step by Step Solution

1. Step 1: Write the proportion equation
   288,992.38 : 433,444.83 = 78,646.72 : x
2. Step 2: Convert to fraction form
   288,992.38/433,444.83 = 78,646.72/x
3. Step 3: Cross multiply
   288,992.38x = 433,444.83 × 78,646.72
4. Step 4: Simplify right side
   288,992.38x = 34,089,014,180.46
5. Step 5: Solve for x
   x = 34,089,014,180.46/288,992.38
6. Step 6: Final answer
   x = 117,958.18