Finding the Fourth Proportional to 104,151.60, 143,729.56 and 56,404.80

Step by Step Solution

1. Step 1: Write the proportion equation
   104,151.60 : 143,729.56 = 56,404.80 : x
2. Step 2: Convert to fraction form
   104,151.60/143,729.56 = 56,404.80/x
3. Step 3: Cross multiply
   104,151.60x = 143,729.56 × 56,404.80
4. Step 4: Simplify right side
   104,151.60x = 8,107,037,085.89
5. Step 5: Solve for x
   x = 8,107,037,085.89/104,151.60
6. Step 6: Final answer
   x = 77,838.81