Finding the Fourth Proportional to 139,978.02, 210,009.41 and 50,008.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,978.02 : 210,009.41 = 50,008.94 : x
2. Step 2: Convert to fraction form
   139,978.02/210,009.41 = 50,008.94/x
3. Step 3: Cross multiply
   139,978.02x = 210,009.41 × 50,008.94
4. Step 4: Simplify right side
   139,978.02x = 10,502,348,840.41
5. Step 5: Solve for x
   x = 10,502,348,840.41/139,978.02
6. Step 6: Final answer
   x = 75,028.55