Finding the Fourth Proportional to 56,906.88, 78,536.72 and 31,417.80

Step by Step Solution

1. Step 1: Write the proportion equation
   56,906.88 : 78,536.72 = 31,417.80 : x
2. Step 2: Convert to fraction form
   56,906.88/78,536.72 = 31,417.80/x
3. Step 3: Cross multiply
   56,906.88x = 78,536.72 × 31,417.80
4. Step 4: Simplify right side
   56,906.88x = 2,467,450,961.62
5. Step 5: Solve for x
   x = 2,467,450,961.62/56,906.88
6. Step 6: Final answer
   x = 43,359.45