Finding the Fourth Proportional to 65,128.32, 97,698.96 and 30,078

Step by Step Solution

1. Step 1: Write the proportion equation
   65,128.32 : 97,698.96 = 30,078 : x
2. Step 2: Convert to fraction form
   65,128.32/97,698.96 = 30,078/x
3. Step 3: Cross multiply
   65,128.32x = 97,698.96 × 30,078
4. Step 4: Simplify right side
   65,128.32x = 2,938,589,318.88
5. Step 5: Solve for x
   x = 2,938,589,318.88/65,128.32
6. Step 6: Final answer
   x = 45,119.99