Finding the Fourth Proportional to 56,061.77, 77,699.21 and 55,012.01

Step by Step Solution

1. Step 1: Write the proportion equation
   56,061.77 : 77,699.21 = 55,012.01 : x
2. Step 2: Convert to fraction form
   56,061.77/77,699.21 = 55,012.01/x
3. Step 3: Cross multiply
   56,061.77x = 77,699.21 × 55,012.01
4. Step 4: Simplify right side
   56,061.77x = 4,274,389,717.51
5. Step 5: Solve for x
   x = 4,274,389,717.51/56,061.77
6. Step 6: Final answer
   x = 76,244.29