Finding the Fourth Proportional to 103,066.56, 155,301.92 and 84,756.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,066.56 : 155,301.92 = 84,756.72 : x
2. Step 2: Convert to fraction form
   103,066.56/155,301.92 = 84,756.72/x
3. Step 3: Cross multiply
   103,066.56x = 155,301.92 × 84,756.72
4. Step 4: Simplify right side
   103,066.56x = 13,162,881,348.90
5. Step 5: Solve for x
   x = 13,162,881,348.90/103,066.56
6. Step 6: Final answer
   x = 127,712.44