Finding the Fourth Proportional to 77,109.06, 115,663.71 and 21,705.06

Step by Step Solution

1. Step 1: Write the proportion equation
   77,109.06 : 115,663.71 = 21,705.06 : x
2. Step 2: Convert to fraction form
   77,109.06/115,663.71 = 21,705.06/x
3. Step 3: Cross multiply
   77,109.06x = 115,663.71 × 21,705.06
4. Step 4: Simplify right side
   77,109.06x = 2,510,487,765.37
5. Step 5: Solve for x
   x = 2,510,487,765.37/77,109.06
6. Step 6: Final answer
   x = 32,557.62