Finding the Fourth Proportional to 100,362.53, 138,493.40 and 55,031.10

Step by Step Solution

1. Step 1: Write the proportion equation
   100,362.53 : 138,493.40 = 55,031.10 : x
2. Step 2: Convert to fraction form
   100,362.53/138,493.40 = 55,031.10/x
3. Step 3: Cross multiply
   100,362.53x = 138,493.40 × 55,031.10
4. Step 4: Simplify right side
   100,362.53x = 7,621,443,869.58
5. Step 5: Solve for x
   x = 7,621,443,869.58/100,362.53
6. Step 6: Final answer
   x = 75,939.14