Finding the Fourth Proportional to 100,820.43, 139,130.06 and 55,496.07

Step by Step Solution

1. Step 1: Write the proportion equation
   100,820.43 : 139,130.06 = 55,496.07 : x
2. Step 2: Convert to fraction form
   100,820.43/139,130.06 = 55,496.07/x
3. Step 3: Cross multiply
   100,820.43x = 139,130.06 × 55,496.07
4. Step 4: Simplify right side
   100,820.43x = 7,721,171,271.38
5. Step 5: Solve for x
   x = 7,721,171,271.38/100,820.43
6. Step 6: Final answer
   x = 76,583.40