Finding the Fourth Proportional to 279,477.68, 385,667.10 and 152,153.72

Step by Step Solution

1. Step 1: Write the proportion equation
   279,477.68 : 385,667.10 = 152,153.72 : x
2. Step 2: Convert to fraction form
   279,477.68/385,667.10 = 152,153.72/x
3. Step 3: Cross multiply
   279,477.68x = 385,667.10 × 152,153.72
4. Step 4: Simplify right side
   279,477.68x = 58,680,683,946.61
5. Step 5: Solve for x
   x = 58,680,683,946.61/279,477.68
6. Step 6: Final answer
   x = 209,965.55