Finding the Fourth Proportional to 1,383,931.35, 1,908,128.61 and 1,138,056.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383,931.35 : 1,908,128.61 = 1,138,056.93 : x
2. Step 2: Convert to fraction form
   1,383,931.35/1,908,128.61 = 1,138,056.93/x
3. Step 3: Cross multiply
   1,383,931.35x = 1,908,128.61 × 1,138,056.93
4. Step 4: Simplify right side
   1,383,931.35x = 2,171,558,987,941.77
5. Step 5: Solve for x
   x = 2,171,558,987,941.77/1,383,931.35
6. Step 6: Final answer
   x = 1,569,123.34