Finding the Fourth Proportional to 100,846.04, 139,162.12 and 55,515.20

Step by Step Solution

1. Step 1: Write the proportion equation
   100,846.04 : 139,162.12 = 55,515.20 : x
2. Step 2: Convert to fraction form
   100,846.04/139,162.12 = 55,515.20/x
3. Step 3: Cross multiply
   100,846.04x = 139,162.12 × 55,515.20
4. Step 4: Simplify right side
   100,846.04x = 7,725,612,924.22
5. Step 5: Solve for x
   x = 7,725,612,924.22/100,846.04
6. Step 6: Final answer
   x = 76,607.99