Finding the Fourth Proportional to 100,839, 139,152.53 and 55,508.13

Step by Step Solution

1. Step 1: Write the proportion equation
   100,839 : 139,152.53 = 55,508.13 : x
2. Step 2: Convert to fraction form
   100,839/139,152.53 = 55,508.13/x
3. Step 3: Cross multiply
   100,839x = 139,152.53 × 55,508.13
4. Step 4: Simplify right side
   100,839x = 7,724,096,725.07
5. Step 5: Solve for x
   x = 7,724,096,725.07/100,839
6. Step 6: Final answer
   x = 76,598.31