Finding the Fourth Proportional to 56,987.49, 78,642.21 and 31,495.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,987.49 : 78,642.21 = 31,495.56 : x
2. Step 2: Convert to fraction form
   56,987.49/78,642.21 = 31,495.56/x
3. Step 3: Cross multiply
   56,987.49x = 78,642.21 × 31,495.56
4. Step 4: Simplify right side
   56,987.49x = 2,476,880,443.59
5. Step 5: Solve for x
   x = 2,476,880,443.59/56,987.49
6. Step 6: Final answer
   x = 43,463.58