Finding the Fourth Proportional to 56,820.72, 78,412.68 and 31,669.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,820.72 : 78,412.68 = 31,669.68 : x
2. Step 2: Convert to fraction form
   56,820.72/78,412.68 = 31,669.68/x
3. Step 3: Cross multiply
   56,820.72x = 78,412.68 × 31,669.68
4. Step 4: Simplify right side
   56,820.72x = 2,483,304,483.54
5. Step 5: Solve for x
   x = 2,483,304,483.54/56,820.72
6. Step 6: Final answer
   x = 43,704.21