Finding the Fourth Proportional to 100,231, 138,323.34 and 55,519

Step by Step Solution

1. Step 1: Write the proportion equation
   100,231 : 138,323.34 = 55,519 : x
2. Step 2: Convert to fraction form
   100,231/138,323.34 = 55,519/x
3. Step 3: Cross multiply
   100,231x = 138,323.34 × 55,519
4. Step 4: Simplify right side
   100,231x = 7,679,573,513.46
5. Step 5: Solve for x
   x = 7,679,573,513.46/100,231
6. Step 6: Final answer
   x = 76,618.75