Finding the Fourth Proportional to 277,238.72, 382,588.98 and 156,379.63

Step by Step Solution

1. Step 1: Write the proportion equation
   277,238.72 : 382,588.98 = 156,379.63 : x
2. Step 2: Convert to fraction form
   277,238.72/382,588.98 = 156,379.63/x
3. Step 3: Cross multiply
   277,238.72x = 382,588.98 × 156,379.63
4. Step 4: Simplify right side
   277,238.72x = 59,829,123,134.48
5. Step 5: Solve for x
   x = 59,829,123,134.48/277,238.72
6. Step 6: Final answer
   x = 215,803.63