Finding the Fourth Proportional to 148,570.72, 205,026.96 and 81,501.28

Step by Step Solution

1. Step 1: Write the proportion equation
   148,570.72 : 205,026.96 = 81,501.28 : x
2. Step 2: Convert to fraction form
   148,570.72/205,026.96 = 81,501.28/x
3. Step 3: Cross multiply
   148,570.72x = 205,026.96 × 81,501.28
4. Step 4: Simplify right side
   148,570.72x = 16,709,959,674.51
5. Step 5: Solve for x
   x = 16,709,959,674.51/148,570.72
6. Step 6: Final answer
   x = 112,471.42