Finding the Fourth Proportional to 208,012,499.63, 287,066,272.91 and 115,193,007.47

Step by Step Solution

1. Step 1: Write the proportion equation
   208,012,499.63 : 287,066,272.91 = 115,193,007.47 : x
2. Step 2: Convert to fraction form
   208,012,499.63/287,066,272.91 = 115,193,007.47/x
3. Step 3: Cross multiply
   208,012,499.63x = 287,066,272.91 × 115,193,007.47
4. Step 4: Simplify right side
   208,012,499.63x = 33,068,027,319,848,384
5. Step 5: Solve for x
   x = 33,068,027,319,848,384/208,012,499.63
6. Step 6: Final answer
   x = 158,971,347.30