Finding the Fourth Proportional to 90,362.28, 124,704.18 and 56,390.88

Step by Step Solution

1. Step 1: Write the proportion equation
   90,362.28 : 124,704.18 = 56,390.88 : x
2. Step 2: Convert to fraction form
   90,362.28/124,704.18 = 56,390.88/x
3. Step 3: Cross multiply
   90,362.28x = 124,704.18 × 56,390.88
4. Step 4: Simplify right side
   90,362.28x = 7,032,178,449.88
5. Step 5: Solve for x
   x = 7,032,178,449.88/90,362.28
6. Step 6: Final answer
   x = 77,822.06