Finding the Fourth Proportional to 81,066.72, 121,595.49 and 21,897.93

Step by Step Solution

1. Step 1: Write the proportion equation
   81,066.72 : 121,595.49 = 21,897.93 : x
2. Step 2: Convert to fraction form
   81,066.72/121,595.49 = 21,897.93/x
3. Step 3: Cross multiply
   81,066.72x = 121,595.49 × 21,897.93
4. Step 4: Simplify right side
   81,066.72x = 2,662,689,528.34
5. Step 5: Solve for x
   x = 2,662,689,528.34/81,066.72
6. Step 6: Final answer
   x = 32,845.66