Finding the Fourth Proportional to 156,610.83, 216,015.90 and 99,996.69

Step by Step Solution

1. Step 1: Write the proportion equation
   156,610.83 : 216,015.90 = 99,996.69 : x
2. Step 2: Convert to fraction form
   156,610.83/216,015.90 = 99,996.69/x
3. Step 3: Cross multiply
   156,610.83x = 216,015.90 × 99,996.69
4. Step 4: Simplify right side
   156,610.83x = 21,600,874,987.37
5. Step 5: Solve for x
   x = 21,600,874,987.37/156,610.83
6. Step 6: Final answer
   x = 137,927.08