Finding the Fourth Proportional to 76,713.51, 105,897.38 and 51,577.59

Step by Step Solution

1. Step 1: Write the proportion equation
   76,713.51 : 105,897.38 = 51,577.59 : x
2. Step 2: Convert to fraction form
   76,713.51/105,897.38 = 51,577.59/x
3. Step 3: Cross multiply
   76,713.51x = 105,897.38 × 51,577.59
4. Step 4: Simplify right side
   76,713.51x = 5,461,931,389.83
5. Step 5: Solve for x
   x = 5,461,931,389.83/76,713.51
6. Step 6: Final answer
   x = 71,199.08