Finding the Fourth Proportional to 100,810.96, 139,118.03 and 55,487.98

Step by Step Solution

1. Step 1: Write the proportion equation
   100,810.96 : 139,118.03 = 55,487.98 : x
2. Step 2: Convert to fraction form
   100,810.96/139,118.03 = 55,487.98/x
3. Step 3: Cross multiply
   100,810.96x = 139,118.03 × 55,487.98
4. Step 4: Simplify right side
   100,810.96x = 7,719,378,466.28
5. Step 5: Solve for x
   x = 7,719,378,466.28/100,810.96
6. Step 6: Final answer
   x = 76,572.81