Finding the Fourth Proportional to 104,111.20, 143,671.72 and 56,364.16

Step by Step Solution

1. Step 1: Write the proportion equation
   104,111.20 : 143,671.72 = 56,364.16 : x
2. Step 2: Convert to fraction form
   104,111.20/143,671.72 = 56,364.16/x
3. Step 3: Cross multiply
   104,111.20x = 143,671.72 × 56,364.16
4. Step 4: Simplify right side
   104,111.20x = 8,097,935,813.56
5. Step 5: Solve for x
   x = 8,097,935,813.56/104,111.20
6. Step 6: Final answer
   x = 77,781.60