Finding the Fourth Proportional to 1,187,131.14, 1,638,488.52 and 1,091,486.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,131.14 : 1,638,488.52 = 1,091,486.34 : x
2. Step 2: Convert to fraction form
   1,187,131.14/1,638,488.52 = 1,091,486.34/x
3. Step 3: Cross multiply
   1,187,131.14x = 1,638,488.52 × 1,091,486.34
4. Step 4: Simplify right side
   1,187,131.14x = 1,788,387,837,826.82
5. Step 5: Solve for x
   x = 1,788,387,837,826.82/1,187,131.14
6. Step 6: Final answer
   x = 1,506,478.75