Finding the Fourth Proportional to 101,123.12, 139,549.80 and 55,801.09

Step by Step Solution

1. Step 1: Write the proportion equation
   101,123.12 : 139,549.80 = 55,801.09 : x
2. Step 2: Convert to fraction form
   101,123.12/139,549.80 = 55,801.09/x
3. Step 3: Cross multiply
   101,123.12x = 139,549.80 × 55,801.09
4. Step 4: Simplify right side
   101,123.12x = 7,787,030,949.28
5. Step 5: Solve for x
   x = 7,787,030,949.28/101,123.12
6. Step 6: Final answer
   x = 77,005.45