Finding the Fourth Proportional to 56,908.52, 78,538.10 and 31,419.79

Step by Step Solution

1. Step 1: Write the proportion equation
   56,908.52 : 78,538.10 = 31,419.79 : x
2. Step 2: Convert to fraction form
   56,908.52/78,538.10 = 31,419.79/x
3. Step 3: Cross multiply
   56,908.52x = 78,538.10 × 31,419.79
4. Step 4: Simplify right side
   56,908.52x = 2,467,650,255.55
5. Step 5: Solve for x
   x = 2,467,650,255.55/56,908.52
6. Step 6: Final answer
   x = 43,361.71