Finding the Fourth Proportional to 139,438.69, 209,160.47 and 56,332.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139,438.69 : 209,160.47 = 56,332.69 : x
2. Step 2: Convert to fraction form
   139,438.69/209,160.47 = 56,332.69/x
3. Step 3: Cross multiply
   139,438.69x = 209,160.47 × 56,332.69
4. Step 4: Simplify right side
   139,438.69x = 11,782,571,534.69
5. Step 5: Solve for x
   x = 11,782,571,534.69/139,438.69
6. Step 6: Final answer
   x = 84,500.02