Finding the Fourth Proportional to 138,196.25, 190,708.59 and 77,766.86

Step by Step Solution

1. Step 1: Write the proportion equation
   138,196.25 : 190,708.59 = 77,766.86 : x
2. Step 2: Convert to fraction form
   138,196.25/190,708.59 = 77,766.86/x
3. Step 3: Cross multiply
   138,196.25x = 190,708.59 × 77,766.86
4. Step 4: Simplify right side
   138,196.25x = 14,830,806,876.95
5. Step 5: Solve for x
   x = 14,830,806,876.95/138,196.25
6. Step 6: Final answer
   x = 107,317.00