Finding the Fourth Proportional to 291,310.86, 402,016.59 and 163,991.10

Step by Step Solution

1. Step 1: Write the proportion equation
   291,310.86 : 402,016.59 = 163,991.10 : x
2. Step 2: Convert to fraction form
   291,310.86/402,016.59 = 163,991.10/x
3. Step 3: Cross multiply
   291,310.86x = 402,016.59 × 163,991.10
4. Step 4: Simplify right side
   291,310.86x = 65,927,142,812.35
5. Step 5: Solve for x
   x = 65,927,142,812.35/291,310.86
6. Step 6: Final answer
   x = 226,312.00