Finding the Fourth Proportional to 100,737.89, 139,018.59 and 55,420.52

Step by Step Solution

1. Step 1: Write the proportion equation
   100,737.89 : 139,018.59 = 55,420.52 : x
2. Step 2: Convert to fraction form
   100,737.89/139,018.59 = 55,420.52/x
3. Step 3: Cross multiply
   100,737.89x = 139,018.59 × 55,420.52
4. Step 4: Simplify right side
   100,737.89x = 7,704,482,547.47
5. Step 5: Solve for x
   x = 7,704,482,547.47/100,737.89
6. Step 6: Final answer
   x = 76,480.48