Finding the Fourth Proportional to 279,991.89, 386,389.20 and 152,667.49

Step by Step Solution

1. Step 1: Write the proportion equation
   279,991.89 : 386,389.20 = 152,667.49 : x
2. Step 2: Convert to fraction form
   279,991.89/386,389.20 = 152,667.49/x
3. Step 3: Cross multiply
   279,991.89x = 386,389.20 × 152,667.49
4. Step 4: Simplify right side
   279,991.89x = 58,989,069,327.11
5. Step 5: Solve for x
   x = 58,989,069,327.11/279,991.89
6. Step 6: Final answer
   x = 210,681.35