Finding the Fourth Proportional to 56,439, 77,888.52 and 31,288.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,439 : 77,888.52 = 31,288.50 : x
2. Step 2: Convert to fraction form
   56,439/77,888.52 = 31,288.50/x
3. Step 3: Cross multiply
   56,439x = 77,888.52 × 31,288.50
4. Step 4: Simplify right side
   56,439x = 2,437,014,958.02
5. Step 5: Solve for x
   x = 2,437,014,958.02/56,439
6. Step 6: Final answer
   x = 43,179.63