Finding the Fourth Proportional to 139,976.24, 210,051.43 and 56,870.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,976.24 : 210,051.43 = 56,870.24 : x
2. Step 2: Convert to fraction form
   139,976.24/210,051.43 = 56,870.24/x
3. Step 3: Cross multiply
   139,976.24x = 210,051.43 × 56,870.24
4. Step 4: Simplify right side
   139,976.24x = 11,945,674,044.01
5. Step 5: Solve for x
   x = 11,945,674,044.01/139,976.24
6. Step 6: Final answer
   x = 85,340.73