Finding the Fourth Proportional to 100,752.42, 139,038.35 and 55,429.43

Step by Step Solution

1. Step 1: Write the proportion equation
   100,752.42 : 139,038.35 = 55,429.43 : x
2. Step 2: Convert to fraction form
   100,752.42/139,038.35 = 55,429.43/x
3. Step 3: Cross multiply
   100,752.42x = 139,038.35 × 55,429.43
4. Step 4: Simplify right side
   100,752.42x = 7,706,816,559.09
5. Step 5: Solve for x
   x = 7,706,816,559.09/100,752.42
6. Step 6: Final answer
   x = 76,492.62