Finding the Fourth Proportional to 72,462.64, 108,697.20 and 19,870.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72,462.64 : 108,697.20 = 19,870.96 : x
2. Step 2: Convert to fraction form
   72,462.64/108,697.20 = 19,870.96/x
3. Step 3: Cross multiply
   72,462.64x = 108,697.20 × 19,870.96
4. Step 4: Simplify right side
   72,462.64x = 2,159,917,713.31
5. Step 5: Solve for x
   x = 2,159,917,713.31/72,462.64
6. Step 6: Final answer
   x = 29,807.33