Finding the Fourth Proportional to 288,796.80, 433,242.72 and 89,110.56

Step by Step Solution

1. Step 1: Write the proportion equation
   288,796.80 : 433,242.72 = 89,110.56 : x
2. Step 2: Convert to fraction form
   288,796.80/433,242.72 = 89,110.56/x
3. Step 3: Cross multiply
   288,796.80x = 433,242.72 × 89,110.56
4. Step 4: Simplify right side
   288,796.80x = 38,606,501,395.12
5. Step 5: Solve for x
   x = 38,606,501,395.12/288,796.80
6. Step 6: Final answer
   x = 133,680.50