Finding the Fourth Proportional to 206,503.83, 309,704.72 and 56,736.86

Step by Step Solution

1. Step 1: Write the proportion equation
   206,503.83 : 309,704.72 = 56,736.86 : x
2. Step 2: Convert to fraction form
   206,503.83/309,704.72 = 56,736.86/x
3. Step 3: Cross multiply
   206,503.83x = 309,704.72 × 56,736.86
4. Step 4: Simplify right side
   206,503.83x = 17,571,671,507.77
5. Step 5: Solve for x
   x = 17,571,671,507.77/206,503.83
6. Step 6: Final answer
   x = 85,091.26