Finding the Fourth Proportional to 101,380.77, 139,897.98 and 56,059.35

Step by Step Solution

1. Step 1: Write the proportion equation
   101,380.77 : 139,897.98 = 56,059.35 : x
2. Step 2: Convert to fraction form
   101,380.77/139,897.98 = 56,059.35/x
3. Step 3: Cross multiply
   101,380.77x = 139,897.98 × 56,059.35
4. Step 4: Simplify right side
   101,380.77x = 7,842,589,825.11
5. Step 5: Solve for x
   x = 7,842,589,825.11/101,380.77
6. Step 6: Final answer
   x = 77,357.77