Finding the Fourth Proportional to 57,012.06, 78,667.82 and 31,856.70

Step by Step Solution

1. Step 1: Write the proportion equation
   57,012.06 : 78,667.82 = 31,856.70 : x
2. Step 2: Convert to fraction form
   57,012.06/78,667.82 = 31,856.70/x
3. Step 3: Cross multiply
   57,012.06x = 78,667.82 × 31,856.70
4. Step 4: Simplify right side
   57,012.06x = 2,506,097,141.39
5. Step 5: Solve for x
   x = 2,506,097,141.39/57,012.06
6. Step 6: Final answer
   x = 43,957.32