Finding the Fourth Proportional to 91,597.86, 137,395.71 and 51,619.86

Step by Step Solution

1. Step 1: Write the proportion equation
   91,597.86 : 137,395.71 = 51,619.86 : x
2. Step 2: Convert to fraction form
   91,597.86/137,395.71 = 51,619.86/x
3. Step 3: Cross multiply
   91,597.86x = 137,395.71 × 51,619.86
4. Step 4: Simplify right side
   91,597.86x = 7,092,347,314.80
5. Step 5: Solve for x
   x = 7,092,347,314.80/91,597.86
6. Step 6: Final answer
   x = 77,429.18