Finding the Fourth Proportional to 139,897.32, 209,768.22 and 56,694.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,897.32 : 209,768.22 = 56,694.12 : x
2. Step 2: Convert to fraction form
   139,897.32/209,768.22 = 56,694.12/x
3. Step 3: Cross multiply
   139,897.32x = 209,768.22 × 56,694.12
4. Step 4: Simplify right side
   139,897.32x = 11,892,624,636.87
5. Step 5: Solve for x
   x = 11,892,624,636.87/139,897.32
6. Step 6: Final answer
   x = 85,009.67