Finding the Fourth Proportional to 1,193,688, 1,643,641.55 and 899,764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,193,688 : 1,643,641.55 = 899,764.72 : x
2. Step 2: Convert to fraction form
   1,193,688/1,643,641.55 = 899,764.72/x
3. Step 3: Cross multiply
   1,193,688x = 1,643,641.55 × 899,764.72
4. Step 4: Simplify right side
   1,193,688x = 1,478,890,673,782.31
5. Step 5: Solve for x
   x = 1,478,890,673,782.31/1,193,688
6. Step 6: Final answer
   x = 1,238,925.64