Finding the Fourth Proportional to 61,219.62, 91,846.56 and 21,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   61,219.62 : 91,846.56 = 21,780.72 : x
2. Step 2: Convert to fraction form
   61,219.62/91,846.56 = 21,780.72/x
3. Step 3: Cross multiply
   61,219.62x = 91,846.56 × 21,780.72
4. Step 4: Simplify right side
   61,219.62x = 2,000,484,206.32
5. Step 5: Solve for x
   x = 2,000,484,206.32/61,219.62
6. Step 6: Final answer
   x = 32,677.17