Finding the Fourth Proportional to 200,088.72, 300,012.10 and 78,363.99

Step by Step Solution

1. Step 1: Write the proportion equation
   200,088.72 : 300,012.10 = 78,363.99 : x
2. Step 2: Convert to fraction form
   200,088.72/300,012.10 = 78,363.99/x
3. Step 3: Cross multiply
   200,088.72x = 300,012.10 × 78,363.99
4. Step 4: Simplify right side
   200,088.72x = 23,510,145,008.37
5. Step 5: Solve for x
   x = 23,510,145,008.37/200,088.72
6. Step 6: Final answer
   x = 117,498.60