Finding the Fourth Proportional to 100,753.33, 139,039.59 and 55,430.34

Step by Step Solution

1. Step 1: Write the proportion equation
   100,753.33 : 139,039.59 = 55,430.34 : x
2. Step 2: Convert to fraction form
   100,753.33/139,039.59 = 55,430.34/x
3. Step 3: Cross multiply
   100,753.33x = 139,039.59 × 55,430.34
4. Step 4: Simplify right side
   100,753.33x = 7,707,011,747.16
5. Step 5: Solve for x
   x = 7,707,011,747.16/100,753.33
6. Step 6: Final answer
   x = 76,493.87