Finding the Fourth Proportional to 56,980.69, 78,633.16 and 31,486.35

Step by Step Solution

1. Step 1: Write the proportion equation
   56,980.69 : 78,633.16 = 31,486.35 : x
2. Step 2: Convert to fraction form
   56,980.69/78,633.16 = 31,486.35/x
3. Step 3: Cross multiply
   56,980.69x = 78,633.16 × 31,486.35
4. Step 4: Simplify right side
   56,980.69x = 2,475,871,000.78
5. Step 5: Solve for x
   x = 2,475,871,000.78/56,980.69
6. Step 6: Final answer
   x = 43,451.05