Finding the Fourth Proportional to 209,330.10, 314,068.05 and 91,086.30

Step by Step Solution

1. Step 1: Write the proportion equation
   209,330.10 : 314,068.05 = 91,086.30 : x
2. Step 2: Convert to fraction form
   209,330.10/314,068.05 = 91,086.30/x
3. Step 3: Cross multiply
   209,330.10x = 314,068.05 × 91,086.30
4. Step 4: Simplify right side
   209,330.10x = 28,607,296,622.72
5. Step 5: Solve for x
   x = 28,607,296,622.72/209,330.10
6. Step 6: Final answer
   x = 136,661.17