Finding the Fourth Proportional to 56,980.31, 78,632.39 and 31,488.39

Step by Step Solution

1. Step 1: Write the proportion equation
   56,980.31 : 78,632.39 = 31,488.39 : x
2. Step 2: Convert to fraction form
   56,980.31/78,632.39 = 31,488.39/x
3. Step 3: Cross multiply
   56,980.31x = 78,632.39 × 31,488.39
4. Step 4: Simplify right side
   56,980.31x = 2,476,007,441.67
5. Step 5: Solve for x
   x = 2,476,007,441.67/56,980.31
6. Step 6: Final answer
   x = 43,453.74