Finding the Fourth Proportional to 56,208.42, 77,567.43 and 31,057.86

Step by Step Solution

1. Step 1: Write the proportion equation
   56,208.42 : 77,567.43 = 31,057.86 : x
2. Step 2: Convert to fraction form
   56,208.42/77,567.43 = 31,057.86/x
3. Step 3: Cross multiply
   56,208.42x = 77,567.43 × 31,057.86
4. Step 4: Simplify right side
   56,208.42x = 2,409,078,381.50
5. Step 5: Solve for x
   x = 2,409,078,381.50/56,208.42
6. Step 6: Final answer
   x = 42,859.74