Finding the Fourth Proportional to 56,321.75, 77,641.20 and 42,869.59

Step by Step Solution

1. Step 1: Write the proportion equation
   56,321.75 : 77,641.20 = 42,869.59 : x
2. Step 2: Convert to fraction form
   56,321.75/77,641.20 = 42,869.59/x
3. Step 3: Cross multiply
   56,321.75x = 77,641.20 × 42,869.59
4. Step 4: Simplify right side
   56,321.75x = 3,328,446,217.01
5. Step 5: Solve for x
   x = 3,328,446,217.01/56,321.75
6. Step 6: Final answer
   x = 59,096.99