Finding the Fourth Proportional to 139,315.70, 208,973.55 and 56,151.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,315.70 : 208,973.55 = 56,151.38 : x
2. Step 2: Convert to fraction form
   139,315.70/208,973.55 = 56,151.38/x
3. Step 3: Cross multiply
   139,315.70x = 208,973.55 × 56,151.38
4. Step 4: Simplify right side
   139,315.70x = 11,734,152,171.13
5. Step 5: Solve for x
   x = 11,734,152,171.13/139,315.70
6. Step 6: Final answer
   x = 84,227.07