Finding the Fourth Proportional to 191,273, 286,943.70 and 78,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   191,273 : 286,943.70 = 78,890.72 : x
2. Step 2: Convert to fraction form
   191,273/286,943.70 = 78,890.72/x
3. Step 3: Cross multiply
   191,273x = 286,943.70 × 78,890.72
4. Step 4: Simplify right side
   191,273x = 22,637,195,092.46
5. Step 5: Solve for x
   x = 22,637,195,092.46/191,273
6. Step 6: Final answer
   x = 118,350.19