Finding the Fourth Proportional to 100,380.35, 138,525.59 and 55,058.67

Step by Step Solution

1. Step 1: Write the proportion equation
   100,380.35 : 138,525.59 = 55,058.67 : x
2. Step 2: Convert to fraction form
   100,380.35/138,525.59 = 55,058.67/x
3. Step 3: Cross multiply
   100,380.35x = 138,525.59 × 55,058.67
4. Step 4: Simplify right side
   100,380.35x = 7,627,034,884.01
5. Step 5: Solve for x
   x = 7,627,034,884.01/100,380.35
6. Step 6: Final answer
   x = 75,981.35