Finding the Fourth Proportional to 90,308.10, 124,686.06 and 56,368.28

Step by Step Solution

1. Step 1: Write the proportion equation
   90,308.10 : 124,686.06 = 56,368.28 : x
2. Step 2: Convert to fraction form
   90,308.10/124,686.06 = 56,368.28/x
3. Step 3: Cross multiply
   90,308.10x = 124,686.06 × 56,368.28
4. Step 4: Simplify right side
   90,308.10x = 7,028,338,742.18
5. Step 5: Solve for x
   x = 7,028,338,742.18/90,308.10
6. Step 6: Final answer
   x = 77,826.23