Finding the Fourth Proportional to 209,485,090.71, 289,098,393.71 and 116,665,598.79

Step by Step Solution

1. Step 1: Write the proportion equation
   209,485,090.71 : 289,098,393.71 = 116,665,598.79 : x
2. Step 2: Convert to fraction form
   209,485,090.71/289,098,393.71 = 116,665,598.79/x
3. Step 3: Cross multiply
   209,485,090.71x = 289,098,393.71 × 116,665,598.79
4. Step 4: Simplify right side
   209,485,090.71x = 33,727,837,210,820,992
5. Step 5: Solve for x
   x = 33,727,837,210,820,992/209,485,090.71
6. Step 6: Final answer
   x = 161,003,521.05