Finding the Fourth Proportional to 56,531.98, 78,010.22 and 31,379.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,531.98 : 78,010.22 = 31,379.50 : x
2. Step 2: Convert to fraction form
   56,531.98/78,010.22 = 31,379.50/x
3. Step 3: Cross multiply
   56,531.98x = 78,010.22 × 31,379.50
4. Step 4: Simplify right side
   56,531.98x = 2,447,921,698.49
5. Step 5: Solve for x
   x = 2,447,921,698.49/56,531.98
6. Step 6: Final answer
   x = 43,301.54