Finding the Fourth Proportional to 931,106.89, 1,395,906.61 and 291,081.12

Step by Step Solution

1. Step 1: Write the proportion equation
   931,106.89 : 1,395,906.61 = 291,081.12 : x
2. Step 2: Convert to fraction form
   931,106.89/1,395,906.61 = 291,081.12/x
3. Step 3: Cross multiply
   931,106.89x = 1,395,906.61 × 291,081.12
4. Step 4: Simplify right side
   931,106.89x = 406,322,059,454.20
5. Step 5: Solve for x
   x = 406,322,059,454.20/931,106.89
6. Step 6: Final answer
   x = 436,386.05