Finding the Fourth Proportional to 56,645.82, 78,169.53 and 31,152.09

Step by Step Solution

1. Step 1: Write the proportion equation
   56,645.82 : 78,169.53 = 31,152.09 : x
2. Step 2: Convert to fraction form
   56,645.82/78,169.53 = 31,152.09/x
3. Step 3: Cross multiply
   56,645.82x = 78,169.53 × 31,152.09
4. Step 4: Simplify right side
   56,645.82x = 2,435,144,233.82
5. Step 5: Solve for x
   x = 2,435,144,233.82/56,645.82
6. Step 6: Final answer
   x = 42,988.95