Finding the Fourth Proportional to 291,300.12, 436,973.76 and 80,938.08

Step by Step Solution

1. Step 1: Write the proportion equation
   291,300.12 : 436,973.76 = 80,938.08 : x
2. Step 2: Convert to fraction form
   291,300.12/436,973.76 = 80,938.08/x
3. Step 3: Cross multiply
   291,300.12x = 436,973.76 × 80,938.08
4. Step 4: Simplify right side
   291,300.12x = 35,367,817,144.78
5. Step 5: Solve for x
   x = 35,367,817,144.78/291,300.12
6. Step 6: Final answer
   x = 121,413.67