Finding the Fourth Proportional to 291,869.02, 437,767.31 and 78,653.61

Step by Step Solution

1. Step 1: Write the proportion equation
   291,869.02 : 437,767.31 = 78,653.61 : x
2. Step 2: Convert to fraction form
   291,869.02/437,767.31 = 78,653.61/x
3. Step 3: Cross multiply
   291,869.02x = 437,767.31 × 78,653.61
4. Step 4: Simplify right side
   291,869.02x = 34,431,978,015.69
5. Step 5: Solve for x
   x = 34,431,978,015.69/291,869.02
6. Step 6: Final answer
   x = 117,970.65