Finding the Fourth Proportional to 191,142, 286,747.61 and 78,759.72

Step by Step Solution

1. Step 1: Write the proportion equation
   191,142 : 286,747.61 = 78,759.72 : x
2. Step 2: Convert to fraction form
   191,142/286,747.61 = 78,759.72/x
3. Step 3: Cross multiply
   191,142x = 286,747.61 × 78,759.72
4. Step 4: Simplify right side
   191,142x = 22,584,161,080.47
5. Step 5: Solve for x
   x = 22,584,161,080.47/191,142
6. Step 6: Final answer
   x = 118,153.84