Finding the Fourth Proportional to 1,185,789.76, 1,636,389.53 and 641,925.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185,789.76 : 1,636,389.53 = 641,925.15 : x
2. Step 2: Convert to fraction form
   1,185,789.76/1,636,389.53 = 641,925.15/x
3. Step 3: Cross multiply
   1,185,789.76x = 1,636,389.53 × 641,925.15
4. Step 4: Simplify right side
   1,185,789.76x = 1,050,439,590,633.04
5. Step 5: Solve for x
   x = 1,050,439,590,633.04/1,185,789.76
6. Step 6: Final answer
   x = 885,856.52