Finding the Fourth Proportional to 208,012,498.88, 287,066,271.88 and 115,193,006.72

Step by Step Solution

1. Step 1: Write the proportion equation
   208,012,498.88 : 287,066,271.88 = 115,193,006.72 : x
2. Step 2: Convert to fraction form
   208,012,498.88/287,066,271.88 = 115,193,006.72/x
3. Step 3: Cross multiply
   208,012,498.88x = 287,066,271.88 × 115,193,006.72
4. Step 4: Simplify right side
   208,012,498.88x = 33,068,026,985,543,348
5. Step 5: Solve for x
   x = 33,068,026,985,543,348/208,012,498.88
6. Step 6: Final answer
   x = 158,971,346.26