Finding the Fourth Proportional to 101,089.98, 139,459.77 and 60,780.42

Step by Step Solution

1. Step 1: Write the proportion equation
   101,089.98 : 139,459.77 = 60,780.42 : x
2. Step 2: Convert to fraction form
   101,089.98/139,459.77 = 60,780.42/x
3. Step 3: Cross multiply
   101,089.98x = 139,459.77 × 60,780.42
4. Step 4: Simplify right side
   101,089.98x = 8,476,423,393.70
5. Step 5: Solve for x
   x = 8,476,423,393.70/101,089.98
6. Step 6: Final answer
   x = 83,850.28