Finding the Fourth Proportional to 101,391.58, 139,917.73 and 56,068.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,391.58 : 139,917.73 = 56,068.30 : x
2. Step 2: Convert to fraction form
   101,391.58/139,917.73 = 56,068.30/x
3. Step 3: Cross multiply
   101,391.58x = 139,917.73 × 56,068.30
4. Step 4: Simplify right side
   101,391.58x = 7,844,948,281.03
5. Step 5: Solve for x
   x = 7,844,948,281.03/101,391.58
6. Step 6: Final answer
   x = 77,372.78