Finding the Fourth Proportional to 139,997.42, 209,863.12 and 89,254.02

Step by Step Solution

1. Step 1: Write the proportion equation
   139,997.42 : 209,863.12 = 89,254.02 : x
2. Step 2: Convert to fraction form
   139,997.42/209,863.12 = 89,254.02/x
3. Step 3: Cross multiply
   139,997.42x = 209,863.12 × 89,254.02
4. Step 4: Simplify right side
   139,997.42x = 18,731,127,109.74
5. Step 5: Solve for x
   x = 18,731,127,109.74/139,997.42
6. Step 6: Final answer
   x = 133,796.23