Finding the Fourth Proportional to 91,878.87, 126,804.59 and 56,061.29

Step by Step Solution

1. Step 1: Write the proportion equation
   91,878.87 : 126,804.59 = 56,061.29 : x
2. Step 2: Convert to fraction form
   91,878.87/126,804.59 = 56,061.29/x
3. Step 3: Cross multiply
   91,878.87x = 126,804.59 × 56,061.29
4. Step 4: Simplify right side
   91,878.87x = 7,108,827,978.99
5. Step 5: Solve for x
   x = 7,108,827,978.99/91,878.87
6. Step 6: Final answer
   x = 77,371.74