Finding the Fourth Proportional to 158,406.72, 218,607.30 and 90,434.76

Step by Step Solution

1. Step 1: Write the proportion equation
   158,406.72 : 218,607.30 = 90,434.76 : x
2. Step 2: Convert to fraction form
   158,406.72/218,607.30 = 90,434.76/x
3. Step 3: Cross multiply
   158,406.72x = 218,607.30 × 90,434.76
4. Step 4: Simplify right side
   158,406.72x = 19,769,698,709.75
5. Step 5: Solve for x
   x = 19,769,698,709.75/158,406.72
6. Step 6: Final answer
   x = 124,803.41