Finding the Fourth Proportional to 84,054.72, 126,089.12 and 21,726.40

Step by Step Solution

1. Step 1: Write the proportion equation
   84,054.72 : 126,089.12 = 21,726.40 : x
2. Step 2: Convert to fraction form
   84,054.72/126,089.12 = 21,726.40/x
3. Step 3: Cross multiply
   84,054.72x = 126,089.12 × 21,726.40
4. Step 4: Simplify right side
   84,054.72x = 2,739,462,656.77
5. Step 5: Solve for x
   x = 2,739,462,656.77/84,054.72
6. Step 6: Final answer
   x = 32,591.42