Finding the Fourth Proportional to 56,569, 78,065.24 and 31,420.84

Step by Step Solution

1. Step 1: Write the proportion equation
   56,569 : 78,065.24 = 31,420.84 : x
2. Step 2: Convert to fraction form
   56,569/78,065.24 = 31,420.84/x
3. Step 3: Cross multiply
   56,569x = 78,065.24 × 31,420.84
4. Step 4: Simplify right side
   56,569x = 2,452,875,415.60
5. Step 5: Solve for x
   x = 2,452,875,415.60/56,569
6. Step 6: Final answer
   x = 43,360.77