Finding the Fourth Proportional to 90,521.42, 124,837.81 and 56,533.01

Step by Step Solution

1. Step 1: Write the proportion equation
   90,521.42 : 124,837.81 = 56,533.01 : x
2. Step 2: Convert to fraction form
   90,521.42/124,837.81 = 56,533.01/x
3. Step 3: Cross multiply
   90,521.42x = 124,837.81 × 56,533.01
4. Step 4: Simplify right side
   90,521.42x = 7,057,456,395.59
5. Step 5: Solve for x
   x = 7,057,456,395.59/90,521.42
6. Step 6: Final answer
   x = 77,964.49