Finding the Fourth Proportional to 77,061.88, 115,592.82 and 21,657.88

Step by Step Solution

1. Step 1: Write the proportion equation
   77,061.88 : 115,592.82 = 21,657.88 : x
2. Step 2: Convert to fraction form
   77,061.88/115,592.82 = 21,657.88/x
3. Step 3: Cross multiply
   77,061.88x = 115,592.82 × 21,657.88
4. Step 4: Simplify right side
   77,061.88x = 2,503,494,738.17
5. Step 5: Solve for x
   x = 2,503,494,738.17/77,061.88
6. Step 6: Final answer
   x = 32,486.81