Finding the Fourth Proportional to 101,388.60, 139,919.94 and 56,068.56

Step by Step Solution

1. Step 1: Write the proportion equation
   101,388.60 : 139,919.94 = 56,068.56 : x
2. Step 2: Convert to fraction form
   101,388.60/139,919.94 = 56,068.56/x
3. Step 3: Cross multiply
   101,388.60x = 139,919.94 × 56,068.56
4. Step 4: Simplify right side
   101,388.60x = 7,845,109,551.09
5. Step 5: Solve for x
   x = 7,845,109,551.09/101,388.60
6. Step 6: Final answer
   x = 77,376.64