Finding the Fourth Proportional to 85,501.62, 128,245.95 and 30,058.74

Step by Step Solution

1. Step 1: Write the proportion equation
   85,501.62 : 128,245.95 = 30,058.74 : x
2. Step 2: Convert to fraction form
   85,501.62/128,245.95 = 30,058.74/x
3. Step 3: Cross multiply
   85,501.62x = 128,245.95 × 30,058.74
4. Step 4: Simplify right side
   85,501.62x = 3,854,911,667.10
5. Step 5: Solve for x
   x = 3,854,911,667.10/85,501.62
6. Step 6: Final answer
   x = 45,085.83