Finding the Fourth Proportional to 100,870.34, 139,190.35 and 55,545.63

Step by Step Solution

1. Step 1: Write the proportion equation
   100,870.34 : 139,190.35 = 55,545.63 : x
2. Step 2: Convert to fraction form
   100,870.34/139,190.35 = 55,545.63/x
3. Step 3: Cross multiply
   100,870.34x = 139,190.35 × 55,545.63
4. Step 4: Simplify right side
   100,870.34x = 7,731,415,019.84
5. Step 5: Solve for x
   x = 7,731,415,019.84/100,870.34
6. Step 6: Final answer
   x = 76,647.06