Finding the Fourth Proportional to 56,581.77, 78,082.53 and 30,740.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,581.77 : 78,082.53 = 30,740.10 : x
2. Step 2: Convert to fraction form
   56,581.77/78,082.53 = 30,740.10/x
3. Step 3: Cross multiply
   56,581.77x = 78,082.53 × 30,740.10
4. Step 4: Simplify right side
   56,581.77x = 2,400,264,780.45
5. Step 5: Solve for x
   x = 2,400,264,780.45/56,581.77
6. Step 6: Final answer
   x = 42,421.17