Finding the Fourth Proportional to 145,973.57, 201,443.43 and 78,905.57

Step by Step Solution

1. Step 1: Write the proportion equation
   145,973.57 : 201,443.43 = 78,905.57 : x
2. Step 2: Convert to fraction form
   145,973.57/201,443.43 = 78,905.57/x
3. Step 3: Cross multiply
   145,973.57x = 201,443.43 × 78,905.57
4. Step 4: Simplify right side
   145,973.57x = 15,895,008,666.91
5. Step 5: Solve for x
   x = 15,895,008,666.91/145,973.57
6. Step 6: Final answer
   x = 108,889.63