Finding the Fourth Proportional to 56,721, 78,274.98 and 31,569.96

Step by Step Solution

1. Step 1: Write the proportion equation
   56,721 : 78,274.98 = 31,569.96 : x
2. Step 2: Convert to fraction form
   56,721/78,274.98 = 31,569.96/x
3. Step 3: Cross multiply
   56,721x = 78,274.98 × 31,569.96
4. Step 4: Simplify right side
   56,721x = 2,471,137,987.60
5. Step 5: Solve for x
   x = 2,471,137,987.60/56,721
6. Step 6: Final answer
   x = 43,566.54