Finding the Fourth Proportional to 162,196.31, 243,268.04 and 56,990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   162,196.31 : 243,268.04 = 56,990.72 : x
2. Step 2: Convert to fraction form
   162,196.31/243,268.04 = 56,990.72/x
3. Step 3: Cross multiply
   162,196.31x = 243,268.04 × 56,990.72
4. Step 4: Simplify right side
   162,196.31x = 13,864,020,752.59
5. Step 5: Solve for x
   x = 13,864,020,752.59/162,196.31
6. Step 6: Final answer
   x = 85,476.80