Finding the Fourth Proportional to 56,911.16, 78,541.75 and 31,422.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,911.16 : 78,541.75 = 31,422.42 : x
2. Step 2: Convert to fraction form
   56,911.16/78,541.75 = 31,422.42/x
3. Step 3: Cross multiply
   56,911.16x = 78,541.75 × 31,422.42
4. Step 4: Simplify right side
   56,911.16x = 2,467,971,856.04
5. Step 5: Solve for x
   x = 2,467,971,856.04/56,911.16
6. Step 6: Final answer
   x = 43,365.34