Finding the Fourth Proportional to 56,106.50, 77,428.42 and 30,613.28

Step by Step Solution

1. Step 1: Write the proportion equation
   56,106.50 : 77,428.42 = 30,613.28 : x
2. Step 2: Convert to fraction form
   56,106.50/77,428.42 = 30,613.28/x
3. Step 3: Cross multiply
   56,106.50x = 77,428.42 × 30,613.28
4. Step 4: Simplify right side
   56,106.50x = 2,370,337,901.42
5. Step 5: Solve for x
   x = 2,370,337,901.42/56,106.50
6. Step 6: Final answer
   x = 42,247.12