Finding the Fourth Proportional to 279,341.59, 385,464.71 and 156,805.91

Step by Step Solution

1. Step 1: Write the proportion equation
   279,341.59 : 385,464.71 = 156,805.91 : x
2. Step 2: Convert to fraction form
   279,341.59/385,464.71 = 156,805.91/x
3. Step 3: Cross multiply
   279,341.59x = 385,464.71 × 156,805.91
4. Step 4: Simplify right side
   279,341.59x = 60,443,145,980.11
5. Step 5: Solve for x
   x = 60,443,145,980.11/279,341.59
6. Step 6: Final answer
   x = 216,377.18