Finding the Fourth Proportional to 90,383.21, 124,714.17 and 56,386.29

Step by Step Solution

1. Step 1: Write the proportion equation
   90,383.21 : 124,714.17 = 56,386.29 : x
2. Step 2: Convert to fraction form
   90,383.21/124,714.17 = 56,386.29/x
3. Step 3: Cross multiply
   90,383.21x = 124,714.17 × 56,386.29
4. Step 4: Simplify right side
   90,383.21x = 7,032,169,356.73
5. Step 5: Solve for x
   x = 7,032,169,356.73/90,383.21
6. Step 6: Final answer
   x = 77,803.94