Finding the Fourth Proportional to 100,758, 139,046.85 and 56,046

Step by Step Solution

1. Step 1: Write the proportion equation
   100,758 : 139,046.85 = 56,046 : x
2. Step 2: Convert to fraction form
   100,758/139,046.85 = 56,046/x
3. Step 3: Cross multiply
   100,758x = 139,046.85 × 56,046
4. Step 4: Simplify right side
   100,758x = 7,793,019,755.10
5. Step 5: Solve for x
   x = 7,793,019,755.10/100,758
6. Step 6: Final answer
   x = 77,343.93