Finding the Fourth Proportional to 101,406.24, 139,941.54 and 56,081.88

Step by Step Solution

1. Step 1: Write the proportion equation
   101,406.24 : 139,941.54 = 56,081.88 : x
2. Step 2: Convert to fraction form
   101,406.24/139,941.54 = 56,081.88/x
3. Step 3: Cross multiply
   101,406.24x = 139,941.54 × 56,081.88
4. Step 4: Simplify right side
   101,406.24x = 7,848,184,653.30
5. Step 5: Solve for x
   x = 7,848,184,653.30/101,406.24
6. Step 6: Final answer
   x = 77,393.51