Finding the Fourth Proportional to 100,757, 139,045.48 and 56,045

Step by Step Solution

1. Step 1: Write the proportion equation
   100,757 : 139,045.48 = 56,045 : x
2. Step 2: Convert to fraction form
   100,757/139,045.48 = 56,045/x
3. Step 3: Cross multiply
   100,757x = 139,045.48 × 56,045
4. Step 4: Simplify right side
   100,757x = 7,792,803,926.60
5. Step 5: Solve for x
   x = 7,792,803,926.60/100,757
6. Step 6: Final answer
   x = 77,342.56