Finding the Fourth Proportional to 113,072.31, 156,052.22 and 64,678.71

Step by Step Solution

1. Step 1: Write the proportion equation
   113,072.31 : 156,052.22 = 64,678.71 : x
2. Step 2: Convert to fraction form
   113,072.31/156,052.22 = 64,678.71/x
3. Step 3: Cross multiply
   113,072.31x = 156,052.22 × 64,678.71
4. Step 4: Simplify right side
   113,072.31x = 10,093,256,282.24
5. Step 5: Solve for x
   x = 10,093,256,282.24/113,072.31
6. Step 6: Final answer
   x = 89,263.73