Finding the Fourth Proportional to 1,211,693.61, 1,672,068.83 and 667,827.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,211,693.61 : 1,672,068.83 = 667,827.72 : x
2. Step 2: Convert to fraction form
   1,211,693.61/1,672,068.83 = 667,827.72/x
3. Step 3: Cross multiply
   1,211,693.61x = 1,672,068.83 × 667,827.72
4. Step 4: Simplify right side
   1,211,693.61x = 1,116,653,911,082.83
5. Step 5: Solve for x
   x = 1,116,653,911,082.83/1,211,693.61
6. Step 6: Final answer
   x = 921,564.58